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Home /  Support Center /  Knowledge Base /  LED bulbs (General)

Do you have high CRI smart LED recessed lights?

Do you make high CRI smart/hub LED recessed lights? Ideally, that is dimmable with an adjustable color temp. Do you have any recessed options? Or are you aware of any high CRI recessed options on the market?

Unfortunately, we do not have any products in our catalog which match the details provided, and we would like to sincerely apologize for any impact this may have on your purchase planning. 

As of this moment, we do not have any recessed lighting fixtures available. The closest match in our catalog would be the LED Ready T8 Fixtures, which are designed for use with our T8 LED Tube Lights, though these fixtures are installed upon the ceiling surface rather than recessed within. 

Unfortunately, we do not have any specific alternate products on the market that we could recommend. 

Do you have 220 volts bulbs?

I wanted to ask you if I can use these bulbs my electricity is 220 volts. Do you sell 220 volts bulbs?

We can confirm that many of our lightbulbs, including the CENTRIC HOME™ Flicker-Free A19 10W LED Bulbs, are compatible with global input voltage (AC90-240V/50-60Hz). 

As a further note, these lightbulbs are also available in the E27 base which is standard for Europe as well as the E26 base, which is standard for North America. 

Do you have a LED bulb for perfect replication of blackbody radiation?

Can you create an LED bulb that perfectly mimics a 6000K blackbody spectrum, from 300nm to 1100 nm?

While this may be theoretically possible, this would not be practical due to the need to include many individual wavelength diodes to ensure coverage across the entire range of wavelengths specified. Phosphors provide wide bandwidth but are generally available in the visible wavelength range only, so the UV and IR regions would need to be supplemented with a large number of different wavelength diodes, which would not be practical in an LED bulb footprint.

Can you create a bulb with zero flicker, that perfectly mimics the solar blackbody spectrum, unfiltered by the atmosphere, in the visible range?

My definition of visible range: "The range of colors visible to even the most sensitive of human eyes."

Our ABSOLUTE SERIES LED products are the closest fit to the request. They are not available in a light bulb shape but can be made flicker-free with the appropriate power supplies and dimming configuration.

​Some people may have visual sensitivity beyond the generally accepted 380-780 nm range, however, and this would require supplemental wavelength energy to truly match (see my response above).

Can you create a bulb with zero flicker, that emits every wavelength in the visible range with equal intensity?

My definition of visible range: "The range of colors visible to even the most sensitive of human eyes."

Please see the 5000 K photometric report at the link below, which shows the spectral power distribution.

The theoretical "Illuminant E" fits the description provided, but it is not feasible with current LED technology due to the limitations described in the response to question 1 above.

What is the difference between GE Reveal and your products?

I just bought a new house and will be upgrading the lights there. I'm a big GE bulb fan but recently ran into your site. Can you explain the difference between what more you provide vs GE reveal and refreshing series of lights?

By our review of the GE Reveal and Refresh lights, they appear to vary in size and features, though the voltage requirements and lumen output of these items appear to be comparable to our standard A19 lightbulbs. That being said, it appears that some of these GE products are dimmable, whereas only our filament A19 bulbs and BR30 bulbs are compatible with dimmers. 

Further, it appears that our LED lights can offer a higher CRI of 95+, whereas the GE products provide a CRI of 90. The higher CRI can be very beneficial for installations such as artwork studios, galleries, and video capture where robust color-accurate illumination is required. 

As our products are designed to be human-centric, they are created to provide full-spectrum, high-quality output that provides a high CRI to combat eye fatigue while ensuring color accuracy. Unfortunately, we have not been able to locate the full photometric reports for the GE products, which we would like to use to provide you with a comparison of the spectrum output. 

In lieu of that, we have attached a link to our full set of photometric test reports for our full spectrum lights in the hope that it proves to be useful for your product comparison. 

Can you also tell me how your light bulbs compare to the product below? It appears to have a higher CRI and R9 value.

The GE Sun-Filled LED product appears to be a new product with what appears to be an improved spectrum intended to better approximate natural daylight. In this regard, the color performance appears similar to our A19 and BR30 products (both of our products achieve 95 CRI and 80+ R9).

Unfortunately, the GE Lighting website does not provide additional information about the extended CRI values, chromaticity, or flicker performance, so we are unable to make any definitive comparisons beyond the general CRI values that their website indicates.

We appreciate your inquiry and will definitely see if we can find more information or even perform internal testing on the GE Sun-Filled product soon!

We would perhaps recommend purchasing both products to test and compare as we can offer a 30-day free return window for all of our products. (Hopefully, GE Lighting's authorized retailers offer a similar returns program, allowing you to perform these tests).

Do you have a 2D-21W-6600K bulb for photographing jewelry?

I am trying to locate this part number 2D-21W-6600K bulb I need it for a photo box for photographing jewelry. I did order some bulbs that were the same size from Amazon but they showed up yellow when I put them in my box. I must have an absolute white color for jewelry is this something that you can help me with? Do you sell them or can you tell me where I might be able to go to get them?

While we do not have any products that utilize that product number, we are happy to confirm that we have many 6500K products designed for photography and color accuracy. 

For your photo box, we would likely recommend our 6500K Ultra High 95 CRI 6500K E26 A19 LED Bulb for Jewelry & Display, which offers flicker-free output and a high CRI of 95+. 

How do your lights compare to incandescent bulbs for EMFs or dirty electricity?

I was wondering if you guys know how your lights compare to a regular incandescent bulb in terms of EMFs/dirty electricity they may possibly give off. I really like the flicker-free aspect of your bulbs, but because they’re LED, was wondering how they may compare regarding that. 

While we are not aware of the relative EMF or dirty electricity that might be output by older incandescent light sources, we can confirm that our lightbulbs do not create any dirty electricity as rated by FCC standards for EMF emissions.

Do you have LED bulbs resembling strip schematics?

Your schematic for LED strips implies that strips fed with pure 24V DC (from batteries or filtered supply) will light without flashing at any frequency. Are there any 24V DC LED bulbs with internally equivalent schematics? I'm looking for extremely low noise for an electro-sensitive application. 

We completely agree that a low-voltage DC LED system will work best for installations that require extremely stable light output. Unfortunately, we do not have any products that are offered in a bulb shape, but we would recommend searching third-party websites for LED bulbs designed for RV systems that utilize low-voltage DC input due to their need to run on battery systems.

High CRI E27 flicker-free LED Bulb

I am looking for a bulb lamp E27, 220V (Europe) with a high CRI value and flicker-free. 3000K or adjustable between 2700-4000K. The light intensity must be dimmable. I prefer a filament bulb. If not possible, an ordinary bulb can also be used. Do you have something to offer, please? I saw on your website article: 4007.30, FilmGrade Flicker-Free A19 Led Bulb. But this is apparently not dimmable in light intensity. Do you have an alternative?

Based on the details provided, the closest match in our catalog would be the 3000K E27 FilmGrade™ Flicker-Free A19 LED Bulb referenced, though we can confirm that this product is not dimmable nor able to offer dim-to-warm adjustable output. 

While we do offer the Ultra High 95 CRI A19 5W LED Filament Bulbs, these products are not designed for E27 bases and are not compatible with global voltage standards. We apologize!

High CRI Bulb for Home Lighting

I am shopping for some high CRI lights for use in my home and had some general questions. 

Is there any way to get the bulbs in 3000K that don't have the issue? 

While I can confirm that the recent batch of the 3000K bulbs has a slight green tint, the color output remains within our color quality specifications. These filament bulbs typically require ~15 minutes or so for the color tint to stabilize, after which the color tint adjusts to being neutral. 

Unfortunately, for our most discerning customers, this greener tint may be bothersome and may not meet expectations. If you receive any products from our website that do not meet your expectations, please feel free to take advantage of our 30-day return policy. 

Will your company be making a higher-wattage version of this bulb in the future? 

As far as I am aware, there are no plans to release a higher-wattage version of the filament bulb products. That said, I would be happy to share your interest in such a product with my development team for future consideration. 

Does your company have any resources or recommendations for lighting design ideas or projects? I am wanting to use strip lights and other types around the house, but I'm looking for some inspiration and ideas. 

For installation inspiration, you might find value in the product reviews posted on our LED Strip Light product pages, where our customers have shared photos and descriptions of their installations. For example, several installation photos can be found on the CENTRIC HOME™ LED Strip Lights for Home & Residential page.

I am interested in doing a horticultural lighting project. I am looking for LEDs that match the sun's natural spectrum but it is hard to find information on this online. 

Does your company have any diodes that are still good but not matching the quality that you can sell? Basically second-tier absolute series. Also if I was to find a source for chips that have the broadest spectrum, does your company have the ability to manufacture strips from the led chips for a reasonable price? 

While we do not sell individual LED components and are unable to accommodate custom product fabrication, you might alternatively be interested in our 6500K FilmGrade™ WHITE LED Strip Lights or 4000K CENTRIC DAYLIGHT™ LED Strip Lights for Commercial & Retail, which are both able to offer a high CRI of 95+, which is just slightly lower than the 99 CRI offered by the Absolute Series. 

Do you have 19A 10W (60w replacement) 95 CRI dimmable 3000K bulb?

Are you planning to make a 19A 10w (60w replacement) 95 CRI dimmable 3000K with a good flood? I have several recessed light fixtures on dimmers I am trying to find high-quality replacement bulbs for. 

We, unfortunately not aware of any plans to introduce a 10W version of our 3000K Ultra High 95 CRI A19 LED Filament Bulb for Home & Residential product. We apologize!

In the interim, you might alternatively be interested in our dimmable 3000K Ultra High 95 CRI E26 BR30 LED Bulb for Home & Residential product, which is designed for recessed ceiling lighting. 

Why your LED bulbs can not be used in enclosed fixtures?

Can you tell me why your bulbs can not be used in enclosed fixtures? Is it because they generate heat? I am looking for bulbs I can use in enclosed light fixtures. 

We can confirm that many of our lightbulbs require moderate airflow to allow for the dissipation of heat from the internal product components. 

When these products are installed within enclosed fixtures that do not allow for heat dissipation, they will experience a higher failure rate. 

As alternatives, you may also be interested in our filament bulbs, such as the Ultra High 95 CRI A19 5W LED Filament Bulb for Home & Residential, which are designed to be compatible with fully enclosed fixtures. 

I'm unsure if the wattage on your filament bulbs will supply enough light for our current 3 bulb 60 watt indacesant kitchen fixture. Can you provide more information on that.

We can confirm that the Ultra High 95 CRI A19 5W LED Filament Bulb for Home & Residential is equivalent to 40W bulbs and has a light output of 450 lumens. 

Do you have a 60-watt equivalent A19 3000K dimmable bulb?

There seem to be only 40w dimmable A19 bulbs on your website or am I not looking in the right place? I'm looking for 800 lumens. 

While our standard non-filament A19 bulbs are 60W equivalent and offer 800 lumens, we can confirm that they are unfortunately not dimmable. 

Depending on the fixture being utilized, you might alternatively be interested in our 3000K Ultra High 95 CRI E26 BR30 LED Bulb for Home & Residential, which is a 60W equivalent dimmable product. 

Does your A19 Bulbs coated with Teflon?

Many shatterproof light bulbs are coated with Teflon (PTFE), which can harm pets such as birds. Can you confirm whether you use potentially harmful coatings on your A19 bulbs? 

We can confirm that our lamps are made of polycarbonate material rather than glass or Teflon. 

As such, there should be no extra coatings on the material or any concerns that might arise from the use of such materials. 

Do your E27 light bulbs have a diffusing surface?

Do your E27 light bulbs have a diffusing surface? I get the impression from the picture that this is the case, but I see no mention in the description. May I ask these two more general questions: 1) I heard that the diffusing eats up around 25% of the light (lumens). Is that true ?, 2) If I have the choice between ceiling-flooding and bulbs (with diffusing surface) in plain sight, is one less eye-straining, or is it the same? 

Our A60 E27 light bulbs utilize a diffuser cover to help distribute the light in an omnidirectional manner and further reduce glare. You are correct, however, that the diffuser does reduce the amount of brightness due to transmission losses. We estimate the loss to be between 10-20%.

We generally recommend using lamps with diffusers for all indoor lighting applications, as the bare LED emitters do provide very high intensity and may be uncomfortable when looked at directly.

Do your lightbulbs have been tested for dirty electricity?

I wanted to see if your lightbulbs have been tested for dirty electricity. I'm trying to figure out what would make them lower in dirty electricity than other light bulbs. 

We can confirm that our lightbulbs do not create any dirty electricity as rated by FCC standards for EMF emissions.

Full spectrum and flicker-free LED Bulbs

Which are the best flicker-free full spectrums that are easy on the eyes?

For flicker-free light that is less strenuous on the eyes, we would recommend the CENTRIC HOME™ Flicker-Free A19 10W LED Bulbs. These lightbulbs are available in the common color temperatures for home installations and produce high CRI flicker-free light output. 

If it proves to be helpful, we have also attached a color temperature selection guide below. 

Which LED Light Color Temperature Should I Choose?

E26 bulbs vs E27 bulbs

My wife purchased a bedroom ceiling light from Europe with an E27 socket base. So far installing an E26 bulb in the fixture has not worked and we now believe we require a true E27 bulb. Do you sell E27 bulbs? Any recommendations? 

Though the E26 and E27 base standards are very similar, some small differences in product measurements can cause E26 bulbs to be incompatible with E27 fixtures, or potentially cause performance and safety issues. 

That being said, we are happy to confirm that our E26 and E27 lights are compatible with global voltage standards, which means that our A19 E27 bulbs should function properly in your European fixture while using the North American voltage standard.

As we generally recommend 2700K color temperature for living areas such as bedrooms, we would recommend the 2700K E27 CENTRIC HOME™ Flicker-Free A19 10W LED Bulb (PN4007.27). 

Do you have high CRI 3000-4000k linear fixtures for under-cabinet lighting?

I’m doing a kitchen reno and I’d like to buy some high CRI under cabinet lighting. I saw you have these under-cabinet LED modules, but I’m worried about glare without a diffuser. Do you have any high CRI 3000-4000k LED light bars or linear fixtures? 

Though we would usually recommend the NorthLux™ 95 CRI T5 LED Linear Light Fixtures as a primary alternative, these products are not available in 4000K. As such, they may not be a good option for your preferred under-cabinet lighting. 

As a second option, we would instead recommend the 24V 4000K CENTRIC DAYLIGHT™ LED Strip Lights for Commercial & Retail. This product can be paired with in-wall dimmers (including smart-home dimmer systems) and powered using in-wall power supplies. Though this is a more involved installation process than the T5 linear lights, the product is able to offer some large advantages.

​Additionally, these LED strip lights can be placed within channels such as our 3.3' (1 meter) Aluminum Channel for LED Flex Strip product, which ships with diffusor covers. In the event that the 3.3' length is not to preference, I believe that third-party channels are also available from third-party marketplaces. 

​For your reference, I have attached a few interactive LED strip light layout diagrams from our website below. 

LayoutMaps™ - LED Strip Light Layout 3001-1A

LayoutMaps™ - LED Strip Light Layout 3001-1B

Can the channels you mention be cut? I have a few smaller nooks (e.g. 18-30"). Would you recommend the flat or corner channels for under cabinets? I'd place them near the front of the cabinet.

In our experience, under-cabinet lighting typically aims directly downward onto the counter surface area. Although we could easily imagine an installation where the corner channel units are back-mounted, this installation does not seem overly beneficial for lights that are to be installed towards the front of the cabinets. 

​As such, we would likely recommend the flat version of the aluminum channels for your installation. 

I'd like to go with the LED strips, and my electrician is coming in soon so I would like to get all the components for pre drywall ordered immediately. For the power supply, do I need a junction box, and should I get 12V or 24V? I see that 24V is out of stock until June 21 and I may need it sooner than that.

Would you be able to help me get a list of all the supplies I need including wire, etc? I'm looking at about 13 linear ft of cabinets / shelving to run strips under, with two opposite walls to cover. I've attached my kitchen layout so you can see.

Based on our conversations regarding the 24V CENTRIC DAYLIGHT™ LED Strip Lights for Commercial & Retail, we would recommend utilizing either the 24V TRIAC Dimmable Power Supply for LED Strip or the 24V CENTRIC SERIES™ Flicker-Free Dimmable Power Supply for LED Strip. 

As the two products are identical feature-wise, the primary difference can be found in the smaller dimensions of the Centric Series power supply, which can be beneficial for installations that require a smaller footprint. If the power supply is required ahead of the TRIAC 24V availability date, we would then recommend the Centric Series. 

As the LED strip lights require 5.5 watts per foot, and as the 24V power supplies can offer 96 watts, each power supply can safely provide power for a maximum of ~17 feet. As such, we would recommend utilizing two power supplies to independently power the two 13 ft segments. 

We have attached links to our LayoutMaps diagram pages below, which contain layout instructions as well as links to each of the recommended connector accessories. I have also shared a link to the list of compatible dimmers (including smart home dimmers) that our power supplies are compatible with. 

​You might notice that Layout 3001-1C illustrates an installation that utilizes two power supplies for two product reels that are connected to one wall dimmer, which might be of interest for your kitchen installation plans. 

LayoutMaps™ - LED Strip Light Layout 3001-1B

LayoutMaps™ - LED Strip Light Layout 3001-1C

Compatible Dimmer List for CENTRIC SERIES LED Power Supply

I have about 13 ft total of strips to run along the two walls combined, not 13 ft on each wall. That being said there will have to be wire inbetween, but does that require extra wattage just for connecting strips across the room or can I get away with one power supply?

Can/should I put these power supplies inside a cabinet, tucked under an upper cabinet, or in a toe-kick or something so they arent covered in drywall in case of replacement, etc?

What wire should I get and can my electrician substitute out some locally available wire? Which wire should I get and can my electrician?

If you are planning to utilize 13 total feet of LED strip light product,we can confirm that one power supply should be more than sufficient. 

We can also confirm that the power supplies can easily be tucked away inside of cabinets or toe-kicks for easy adjustment, and do not necessarily need to be installed within the walls except to have access to in-wall power and connection to any in-wall dimmers or light switches.

Generally speaking, we recommend utilizing 16 AWG wiring to reduce the chances of voltage drop, which is available in our storefront. That said, this gauge of wiring is also very likely to be available from your local hardware stores. 

​Your electrician will likely be able to provide precise advice for the installation, though we generally like to inform customers that large wired gaps between the power supplies and products can cause some voltage drop, though this can be reduced by using a higher gauge of wiring. 

Do you make floor lamps?

Do you make floor lamps? If not, where can I buy a floor lamp that can use your bulbs?

Though we do not currently have floor lamps in our product catalog, we can confirm that our LED A19 lights, such as the CENTRIC HOME™ Full Spectrum Flicker-Free A19 10W LED Bulb, are designed to be compatible with standard E26 base fixtures. 

As the E26 base is common in North America amongst standard home light fixtures, we would not expect any compatibility issues with fixtures purchased elsewhere. 

How to convert lux to PPFD?

May I ask about the formula for your Lux to PPFD conversion? Specifically for the "Red + Blue LED 450 + 650 nm"

Thank you for reaching out. The formula we use for converting lux to PPFD for the "Red + Blue LED 450+650 nm" spectrum is:

​Lux = 11.27 * PPDF

Can I ask why is it 11.27?

That is the conversion factor between lux and PPFD for the particular spectrum that you requested the information for. Each spectrum has a different conversion factor due to the variations between how lux and PPFD are calculated.

Can I ask how? or where it came from? 

The conversion factor was calculated on our end by comparing the resulting lux and PPFD values when inputting the SPD in question.

How to calculate the foot candle requirements?

I am struggling to translate the various lumens of different chandelier fixtures I am considering for a dining room into incandescent equivalents or just figuring out if the lumens are sufficient. How you did do the final calculation of the over 12,000 lumens that you got to use the size of the room and the ceiling height?

The basic calculation formula for estimating lumen needs is:

​Illuminance (footcandles) = light output (lumens) / surface area (square feet)

Additionally, we factor in the reflectivity of the walls (linear adjustment based on reflectivity %) and the ceiling height. Ceiling height is accounted for on a logarithmic basis (base 10) and an adjustment factor of 20.

​If you're looking for a more simplified way to verify the outputs of the calculator, we would recommend setting the wall reflectance to 100% and the ceiling height to 8 ft.

Why are your LED bulbs not recommended for closed-light fixtures?

I just purchased 6 of your LED bulbs. Why are they not recommended for closed-light fixtures? 

We can confirm that several of our products are not recommended for enclosed fixtures due to the requirement for heat dissipation.

As LED products contain heat-sensitive internal hardware components, the bulbs will require a moderate amount of airflow to function properly and prevent overheating. Comparatively, traditional incandescent bulbs do not contain any hardware or materials within the fixture that are heat sensitive.

Do your products reduce the blue light effect as much as incandescent?

I've been reading up on blue light side effects from fluorescent and LED lighting. Damage to mitochondria, particularly in the eyes. Do your products reduce that blue light effect as much as incandescent? 

​You may be interested in referencing the M/P ratio in determining the relative amounts of blue light content in various light bulb products.

​Incandescent bulbs generally have an M/P ratio of 0.55, which suggests that approximately 55% of the light emitted from the light source is considered ​to be in the blue wavelength range.

​Our Lux24 circadian lamps, on the other hand, have an M/P ratio of 0.39, which reduces the blue light content even further to 39%. Please see below for the product link and additional information on blue light:

So it sounds like from the blue light perspective your bulbs are an even better alternative than incandescent. 

Yes, but it is also important to keep in mind that other factors, such as proximity to the lamp as well as exposure duration, and time of day (e.g. close to bedtime) can all be important factors to consider as well.

Would it possibly lessen the hazard of installing E26 bulbs in the E27 socket at 120V?

I read with interest your blog article "E26 vs E27 Bulbs - Interchangeable? Not Necessarily!", but it left me with a question. Apparently, there are lighting fixtures sold here in the US that have E27 sockets. While your article calls out the hazards of E26 bulbs in E27 sockets at 240V, it did not comment about E26 in E27 at 120V. Would that possibly lessen the hazard? 

Though the design differences are slight, the small gap present between an E26 light installed within an E27 socket base can cause arcing or hazards that are separate from any potential voltage compatibility issues that might arise.

As our E27 and E26 bulbs both are designed for global voltage standards, we can confirm that the E27 versions can be safely used within fixtures designed for European or other voltages.

For example, if a European chandelier with E27 sockets was to be used with 120V AC North American voltage standards, we would recommend using our E27 A19 bulbs, as they are capable of being used with 120V AC voltage even though the base is typically used in global fixtures.

How there's no additional electromagnetic interference (EMI)/Microsurge Electrical Pollution (dirty electricity) on the sine wave when the voltage is being stepped down?

Do you know how there is no additional electromagnetic interference (EMI)/Microsurge Electrical Pollution AKA dirty electricity on the sine wave when the voltage is being stepped down? How are you able to avoid that? Perhaps it's there, but my meter only measures 10kHz - 100kHz, so if the frequency on the line is more than that, I can't pick it up. Do you know if it's there, but at a higher frequency range?

Our focus has been on ensuring that the light output (i.e. visible wavelengths between 380-780 nm) have complete spectral coverage and are emitted in a flicker-free manner, but unfortunately, EMF and dirty electricity have not (yet) been a focus area for our product designs and development. As such, we unfortunately don't have any data, measurements or specification-level guarantees regarding a certain level of EMF or dirty electricity that our bulbs would produce.

We have been receiving quite a bit of interest among customers who are concerned about EMF and do hope to put in some additional product development work to better understand the product design and power topologies needed to ensure an "EMF-safe" product and do hope we are able to make progress in this area in the coming months.

Are the frequencies of the light given by the bulb an actual representation of the visible light spectrum? I believe the frequencies range from near 400nm to 700+ish nm. I know typical LEDs will trick the eye into seeing warmth, but you're really getting a lot of blues and greens - I'm not familiar with the technology, only that it's becoming less popular in the eye health world. If CRI95, being the closest to the sun compared to any other companies that I've seen, means that the full spectrum of those frequencies are actually coming from the light bulb, then that makes me super happy! Can you elaborate? Am I understanding that correctly?

Our focus has been on LED emitter devices and the relative composition of the energy output and balance across this visible wavelength range, and this is where our products offer a strong competitive advantage. As you correctly mention, the CRI metric is a great way to make this comparison, and our products have a 95+ CRI rating, which does indeed suggest that it closely approximates natural light.

For additional information, please see our high CRI LED product page below:

Our understanding is that the superior visible spectrum quality of our LED emitters is independent of the EMF and dirty electricity concerns, which is a separate issue tied to the electronics and components used in the power conversion, and this is an area we have yet to invest sufficient R&D efforts into.

What is meant by "dim-to-warm" capability of the products?

I'm doing a kitchen/bathroom remodel and care very much about light quality! A friend told me to be sure that the products I choose have a "dim-to-warm" capability. I'm not sure exactly what that means, I presume that the light quality is maintained across the entire spectrum of "bright" to "dim". 

Generally, dim-to-warm is a term used for products that are designed to smoothly transition the color temperature output.

Though we do hope to offer similar products in the future, we currently do not have any dim-to-warm products at this time.

5500K vs 6500K Color Temperature for Video Lighting Application

I do live streaming from an indoor studio using a green screen and I apply the chroma key. At present, I am 5500K color temp bulbs. Would the quality of my video improve with 6500K color temp or not? Which of these two color temp will produce a better and more natural skin tone? 

Our range of daylight calibrated LED lamps sound like a great option for your video lighting application.

​When it comes to skin tones, the most important factor is the color rendering index (CRI) and R9 value of the light source. As long as the color rendering values are sufficiently high, color temperature is actually of relatively little importance.

The reason for this is that video cameras and post-production software are both able to perform color temperature calibrations very well, without any loss of color accuracy. You will most likely see this calibration setting labelled "white balance" with options such as incandescent, direct sunshine, overcast daylight, etc.

Natural daylight can shift significantly in color temperature depending on the weather, time of day, season and other factors. Therefore, camera systems have been developed around this expected variability and you should not see any significant differences in skin tone color rendering, as long as you are using a high CRI light source.

Do you have LED lights for Pool Lighting

Do you have lights I can put around my pool on the outside under the ledge? They might get splashed.

With the exception of the realUV™ LED Flood Light product, the other items in our catalog are unfortunately not rated for contact with water or moisture. Generally speaking, any contact that these products have with moisture could cause a safety hazard and void the product warranties.

Difference between Centric and NorthLux Products

Would you be able to let me know if there is any difference between the Centric bulbs and NorthLux bulbs with the same color temperature? I noticed that there are a number of products where there are Centrix and NorthLux bulbs with the same CCT, wattage, and price, and online pictures. I'm curious as to whether the products differ in some way. 

We can confirm that some products, such as the NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio and the D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) are actually identical items that are given unique landing pages for marketing purposes. 

​By comparison, though the CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free A19 10W LED product is of the same family line, the 5000K color temperature does not conform to the D50 color standard as the above products do.

We do apologize for any confusion this might cause in your order planning. As a general note, identical products can be noted by the shared part number. For the above D50 products, that number is PN4005.D50. In these instances, the functionality and performance will be identical, though the color temperatures available might change.

Will your flicker-free light bulbs prevent flickering during power fluctuations?

I am interested in your flicker-free lighting, but I have one important question: Will your flicker-free light bulbs prevent flickering during power fluctuations as well? For example, some of our current led lighting (Feit -- cheap, I know) flickers when we run devices/appliances that draw heavy loads like the washing machine, 3d printer, etc. Do your bulbs solve this problem?

We are happy to confirm that the flicker-free LED bulbs will offer flicker-free performance under normal running conditions. However, it is difficult to know how these products would react if power fluctuations occur, due to the numerous potential variables.

However, if these items experience considerable flickering or fluctuations while operating at with same time as the high-power draw devices and appliances, please know that we are happy to offer a 30-day return policy for all orders.

What are the risks of LED Red Light Therapy?

I'm looking into red light therapy - do you know if the same LED dangers exist in RLT devices? 

Though we were unable to provide direct expertise in red light therapy, we are happy to confirm that the majority of risks associated with LED lighting products can be associated with overexposure to blue light during evening hours. Excess blue light exposure during these periods can disrupt the circadian rhythm, where LED lighting with high flicker rates can also cause eye fatigue and headaches.

While we generally recommend speaking to a red light therapy professional to better understand your risks, we also have a terrific blog post on our website regarding the potential risks of LED lighting which I hope you find valuable.

Are LED Lights Safe? Are They Harmful to Your Health?:

Recommended Color Temperature for Bathroom Lighting

I'm retrofitting 4 light fixtures that I bought but couldn't get in the color temperature that I needed for my project. I've looked through all of your information which is great! but I'm still not sure exactly what temperature and/or combination of pieces I need to finish my home project. I'm working on my bathroom which will be almost completely white. My current lights are 3000 or 3500K. Way too yellow. I need something white. But I'm afraid to go too blue. 

Regarding the color temperature, we generally recommend the 4000K option for spaces such as powder rooms and bathrooms.

Here is another blog post from our website regarding color temperature selection, which might be helpful for your planning purposes.

Which LED Light Color Temperature Should I Choose?:

Are your products CSA or ULC certified for Canada?

Are your products CSA or ULC certified for Canada? Do your light bulbs create dirty electricity? 

Our lamps are UL certified for US standards only at this time. We do apologize for any inconvenience.

​The lamps do not create any dirty electricity as rated by FCC standards for EMF emissions.

Does this mean they do not produce any dirty electricity at all, or just by the levels set out by the FCC they are considered to produce no dirty electricity?

Would you have any information on what those levels are as I can not find anything on them?

I did a bit of digging and was able to locate the document below outlining the FCC Part B requirements for emission limits.

We do hope this is a helpful starting point for quantifying "dirty electricity."

Edison Style E26 LED Bulb with Higher Lumen Output

I am looking for a good quality Edison style E26 led bulb that offers 600 plus lumens at 3,000k color light. Do you have any that offer that, as I only see a lumen output of 450 on your website? Also, do you have any Edison type that offers a no-flicker option? We are having issues finding Edison-style LEDs that don’t flicker and aren’t sure where to look especially at 3000k color light. 

Though we do offer Edison-style E26 bulbs in the 3000K color temperature, you are correct that these items are unfortunately not flicker-free, and have an output of 450 lumens.

That being said, I can confirm that we hope to offer a higher-lumen output version of this product sometime in the future, although I do not have any precise dates on hand.

Any idea why the Edison LED style flicker more than the typically led style bulb? We would like to have the Edison style in some of our chandeliers and pendants but the flicker is bothering us. Also, why is it so hard to find quality 3,000k Edison-style LED bulbs? 

Though we cannot comment on the availability or features of 3000K filament bulbs elsewhere, we can confirm that our filament bulbs are currently not flicker-free due to hardware constraints.

As we are continually improving these products with engineering updates, we hope to eventually provide flicker-free performance for all of the products in our catalog.

LED Lights in Overhead Soffit to Reflect Off the Ceiling

I generally sit in that recliner at the far end to read. Want to put sufficient light in the overhead soffit to reflect off the ceiling and illuminate the read. The table lamp shown is decorative the task light, barely visible by the chair, is what I use now. Has an LED bulb in it. Glares for the wife seated on the couch. It works well if I bring it down close to the read (magazine or newspaper) bulb is white.

It sounds like we have a few lighting fixtures in your space. To start, are you able to confirm what type of lamps or bulbs your fixtures can accommodate?

​For example, the soffit looks like it may accommodate fluorescent fixtures, but it's a bit difficult to tell from the photo.

​Similarly, are the table lamp and task light standard fixtures that use medium-screw Edison bases (E26)? (E26 is the most commonly seen, traditional screw-in lamp type with a base that is approximately 1 inch in diameter).

Once you can let us know what types of lamps may be compatible with your existing fixtures, we'll have a better idea of what options we have available for you. 

​Additionally, can you let us know what challenges you're facing with your existing lighting - is it the color, clarity, brightness, or a combination of these factors?

​The soffit has a string of incandescent mini lights, circa 1992. We do not use the table lamp but it and the task light use standard e26 screw-in bulbs, the problem is insufficient illumination. The task light if I bring it close to the reading material will work but is ungainly and if it is set higher is not quite enough light but glares at anyone sitting on the couch. I had thought that linear LEDs in both soffits above the chair reflecting off the ceiling might work but leave that to your expertise. Using dimmers they could also provide illumination for the room. The soffit runs on three sides of the room.

We are in full agreement that improving the brightness from your soffit lighting fixture would be the best approach here to simultaneously increase brightness without causing additional glare issues.

​Unfortunately, despite their ubiquity, standard light bulbs induce significant amounts of glare due to their high brightness levels from a relatively small size.

Our first thought here would be to recommend our CENTRIC HOME LED strip lights in 3000K. These LED strip lights emit approximately 450 lumens per foot, which is approximately equal in brightness to a 40-watt incandescent bulb. 

It's a bit difficult to determine from your photo, but my best guess would be that your soffit is approximately 10 feet long. If you were to install the LED strip lights across the entire soffit, this would provide you with approximately 4500 lumens, or 400 watts worth of incandescent bulb brightness.

The LED strip lights could of course extend and span multiple soffits across the three sides of the room as you suggest.

The LED strip lights do require some in-wall wiring and assembly work, but I do believe that this would be an excellent option for you. Below is an example wiring diagram that shows how the LED strips can be wired to a wall dimmer:

Sometimes sitting on the end of the couch to utilize the halogen Torch which almost does the job but could be better. The new light needs to be dimmable, and maybe the color change? 

Each one of the curtains is approx 6 ft across giving us approx 12 ft of the strip light. Approx 5500 lumens per your calculations. You mentioned 3000 Kelvin. Is that overly yellow for reading? Are your strip lights disabled and what dimmer do you suggest for the best performance? 

Is there an approved dimmer for 3-circuit control? I note that LeGrand makes a couple although I am partial to Lutron. 

I personally do not believe that 3000K is "too yellow" although that would certainly be within the realm of personal preference. Do you know what the color temperature of the lamps in your current space is, and what your thoughts on those might be? (Incandescent bulbs are typically 2700K and lower).

To cover the distances you quoted, you will likely need three sets of 16.4 ft LED strip reels, each with its own dimmable power supply. The cost estimate is as follows:

CENTRIC HOME™ LED Strip Lights for Home & Residential: $99 ea

TRIAC Dimmable Power Supply for LED Strip: $139 ea

​We do not have any three-circuit control suggestions, but we do have a list of tested dimmers which are available here:

The reading lamp has a 790-lumen GE REVEAL built therein. It is I think overly bright white. If I bring it clues to the reading material it works but is glary with poor contrast and if further away not bright enough but not heavy. The soffit has a string of very old very small incandescent. I think we might try one set in the two soffits over the Chair to see how this indirect lighting works. 

We believe the GE Reveal lamps use a modified 3000K spectrum. If you find the incandescent lights in the soffit to be acceptable from a color perspective (i.e. not too yellow), then 2700K could also be a good option for you.

Below is an article that might help choose between the two options:

Does a high CRI LED that produces more PPFD better for growing light than 6500K and more than low CRI?

Am I correct in understanding that High CRI LED at 3000K is a better choice for grow light in that it produces more PPFD than 6500K and more than Low CRI? I'm a little confused as the spectrum picture for 6500K looks more like what I see other grow lights showing, compared to the spectrum for 3000K. 

While you are correct that certain warm-white spectra will produce more PAR per unit energy, the additional PAR energy may or may not be better suited for growing.

​At a basic level, PAR tells us about the number of photons that fall within the range of wavelengths capable of inducing photosynthesis. It does not, however, tell us how capable those particular photons are of inducing photosynthesis.

​As such, it can be a bit misleading to compare just PAR values (PPF / PPFD) to determine "how good" a grow light is, as much will depend on the specific distribution of energy across the spectrum.

The 6500K you commonly see is a close approximation of natural daylight, so this is typically seen as a solid reference point for horticultural lighting applications.

LED Linear Lighting for Bright Reading

I am 99 and my wife is 89. Our eyesight is not like it was. I find that task lighting is not good. We have a high ceiling den with a soft and decorative light string. Thinking linear LED in the soffit to project on the tray ceiling would provide good defused bright reading. 

If you could determine what color temperature you were interested in for your installation, we would be more than happy to provide a few product recommendations.

If a guide for color temperatures proves to be useful, we have provided a link to a blog post from our website below.

Which LED Light Color Temperature Should I Choose?:

For more information on getting started with the LED Strip Lights products, I have attached a second blog post from our website below.

LED Strip Lights: Everything you need to know before you buy:

Under Cabinet Lighting

Would you mind informing me when the undercabinet lighting will be available for purchase?

Though we currently do not have plans to manufacture under-counter lighting products at this time, I am happy to confirm that several customers have utilized our LED light strips and aluminum channels in order to mount lengths of under-cabinet lighting.

Full Spectrum and Flicker-free LED Strips for a Dark One-Bedroom Apartment

I want to put hidden lights all around the ceiling of a dark one-bedroom apartment. I like a full-spectrum LED. Please help me understand and choose the right product. 

We believe that a great first step would be utilizing our standard bulbs in the lighting fixtures in your space.

Based on the details that you provided, we believe that replacing the existing light bulbs could make a large difference at a significantly lower cost than the LED strip light products. As such, we have provided some product links below.

Due to the stated preference for lighting which is similar to direct sunlight, we recommend the 5600K color temperature option of the FilmGrade™ Flicker-Free A19 LED Bulb. 

​This product can be easily installed into standard lighting fixtures, has a 3-year warranty, and offers full spectrum lighting that will appear visually identical to that of natural sunlight.

Product link:

Choosing LED Lighting Allowed for TBI Conditions

I respond poorly to conventional LED lighting. As far as I can tell, my traumatic brain injury causes a response, not unlike that of an epileptic to the flashing of LEDs. The problem could be in the cold blue of the lights used in many commercial settings, or simply the intensity. Can you direct me to articles that will help me understand the problem — and choose bulbs? I am starting with a shop space and I am concerned that the 5000k fixtures you offer will be too white for my eyes. 

Our research and development for our products is generally limited in scope to the technical performance of the LED lighting system, so when it comes to their efficacy in a medical context, our data and ability to provide definitive answers is quite limited.

That being said, I do believe that you are definitely on the right track when attempting to determine the source of symptoms caused by LED lamps.

I have seen most studies link the flicker produced by artificial lighting to detrimental health effects, while the concern with blue light seems generally centered on circadian rhythm disruption.

Natural sunlight is essentially a flicker-free, 100 CRI light source that has a color temperature of 5000K or higher (depending on the season, time of day, etc). Does exposure to natural daylight produce those symptoms for you? If not, I would suspect the issue is more likely related to flicker, rather than color temperature and intensity.

In addressing your lamp configuration question, you are correct that installing our tube lights in a fixture will require some considerations to ensure fixture compatibility. One search that may yield some results is "LED ready T8 fixtures" as these fixtures are built and assembled without any ballast inside.

We are also looking to launch a line of LED ready T8 fixtures in the coming weeks so that could be an option as well.

Photophobia can be a real problem for some people with TBI, so they use sunglasses outside and in most indoor spaces. Somehow, most LEDs seems brighter than outdoor light to my eye, or to my brain. It may be that flicker creates irritation and calls my attention to the lights.

With your input, I am more confident that your 5000k shop lights will work for the space I have in mind. I will start with enough fixtures to test my response to them. I will also look into LED ready fixtures (that will support your 4000k bulbs).

​Your observation that most LEDs seem brighter than outdoor light is very much valid and I suspect the nuanced difference is due to the way in which the light is distributed.

​A single 800 lumen daylight bulb may produce far less light than natural daylight (i.e. "brightness") but the way in which the light is emitted from a very concentrated 1-2 inch sphere is quite unnatural and will most certainly appear brighter to the human eye. Contrast this with natural daylight, where the light falls down from an entire diffused dome of light, aka "the sky," and you can see why our eyes would react differently.

In short, the way in which the light is installed and distributed in your room may also have an effect on your perception and reaction to the lighting environment. For this reason, wall-washing and cove lighting (indirect lighting methods which bounce the light off of interior surfaces) are popular options that can provide a more comfortable space.

Difference between FilmGrade and Centric Home A19 Bulbs

What is the difference between FilmGrade and Centric Home?

We can confirm that the FilmGrade™ Flicker-Free A19 LED Bulbs and the CENTRIC HOME™ Full Spectrum Flicker-Free A19 10W LED Bulbs are the same product. As such, both items can be expected to offer the same benefits.

We do apologize for any confusion caused, as the product is shown on multiple pages for marketing purposes. This can be noted by the shared part number (4005.30) listed in the item description for both products.

Impact of the Enclosed Fixture on Light Output

What happens to the effective spectrum of a bulb if it is used in a lampshade, or in an enclosed fixture with a glass cover? 

Most glass covers and lampshades have a minimal effect on the spectrum of light emitted by our products. Generally speaking, the whiter (clear/translucent) the material, the less effect it would have on the spectrum.

​Unless the lampshades or covers have a significant color/tint to them, you will most likely not observe any color or spectral shifts.

Difference between NorthLux and D50 A19 Bulbs

I ordered the NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio - 1-Pack / 5000K and D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) - 1-Pack / E26 (North America). Are they the same product? 

Regarding the products mentioned, we can confirm that the NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio and the D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) are the same product.

We do apologize for any confusion caused as the product is shown on multiple pages for marketing purposes. This can be noted by the shared part number (4005.D50) listed in the item description for both products.

I have a new question about the aluminum channel for LED Flex Strip. How are the corner channels mounted? I only see the mountings pictured for the flat channel.

We're happy to confirm that the Aluminum Channel for the LED Flex Strip product arrives with installation accessories, including ten mounting brackets and screws that can be used for affixing the channels upon a surface.

Do you have an Emission Spectra Data of LEDs

Do you have data on the wavelengths your LEDs emit? I am interested in something that emits a little bit of UV as well as visible light, ideally with varying intensity.

We do provide the spectral data on our LEDs which can be found on the Photometrics page, found below:

​We unfortunately do not have any products that simultaneously emit UV and visible light.

​For such applications, we would recommend using our UV LED products in conjunction with our standard white LED products. 

My application is in research and I am trying to get diffused, full-spectrum lighting in a small chamber (a paint bucket) to study varying fluorescence in biological samples. This also has to work in conditions with a lot of water, so I need to figure out a mobile power supply and computer controls if possible.

I will probably need around 4 strips in total. Is it possible to do a call where we can discuss setting up a power supply and perhaps which strips work best for this application? The most important part is consistent light output and ideally some control over intensity.

Our LED strip lights should be a great option for your needs. We do offer several options, including our ABSOLUTES SERIES in calibrated 5000K/6500K color options as well as our realUV LED strip lights which can provide the 365 / 395 nm wavelengths for the fluorescence effects you are looking for.

You also mentioned that you are after the ability to vary the intensity, and this is also something that can be accomplished via our flicker-free LED dimmer:

Below are some installation diagrams that you might find useful:

Does Feiss Issen 2-Light Flush Mount Fixture compatible with your A19 Bulbs? 

I currently have 8 Sylvania 21942 - FO25/741/ECO T8 Fluorescent lights in my L-shaped kitchen and each leg of the L is approximately 12'x7'. Each of these bulbs is 25W, 4100K, and 1755 lumens. I'm switching out the old fixtures and replacing them with 3 Feiss Issen 2-Light Flush Mount FM504SN. It has a closed round glass shade: D: 13.5" H: 1.25" and uses 60W A19 medium incandescent bulbs. I'd like to use LEDs instead, being mindful that the light is closed, not open. Any suggestions?

Based on our review of the Feiss Issen 2-Light Flush Mount product, it appears that while otherwise compatible, the fixture is completely enclosed.

As our A19 bulbs would require a moderate amount of airflow for heat dissipation, these may not be the ideal fixtures for use with our A19 products.

However, we would be more than happy to review any other light fixtures for product compatibility.

High CRI bulbs for Coffee Roasting and Production

I recently purchased a case of bulbs from you and I am curious about how to adapt the lighting in a roasting space. Color is very important for coffee roasting so I am looking for a high CRI value bulb, but the ones I tend to get are not very "bright" or it seems dim in the space. Does the "K" value affect this? 

We're happy to confirm that the color temperature value is not tied to the CRI value or brightness. The brightness of the light emitted by a bulb is measured by the lumen output, whereas the color temperature measures how 'warm' or 'cool' the light appears to be. On the other hand, CRI measures how similar the light output is to that of natural sunlight.

While you may find that higher CRI products have a lower lumen output than traditional incandescent bulbs, the higher CRI bulbs have the benefit of offering light that has a similar spectral output to natural daylight.

If it proves to be useful, here is an article from our website which describes CRI in detail:

LED Tube vs Strip Lights: Which should I choose?

I'm trying to choose between LED Tube and Strip Lights, and I need info on how I can hook it into my existing ceiling outlet box. 

While each installation can differ, we generally recommend using our LED tube lights if there is an existing 4-ft fixture already in place. Our LED tube lights can be used without a ballast and therefore can be used without any additional electronic components.

LED strip lights, on the other hand, can provide you with some additional versatility and installation options. This approach, however, will require additional wiring and configuration, including power supply units and LED strip assembly.

I actually have six separate tracks on separate dimmer switches. They connect to the ceiling wiring through the standard round plastic end feed box that is recessed into the ceiling. Are there any other advantages or disadvantages I should be aware of for strips vs tubes?

If I go with the strip light option, what do I need to do? How does it connect to the end feed and will the extra transformer fit inside the end feed? Will I need new dimmer switches? I currently use these (Lutron CTELV-303P-WH Skylark Contour 300W Electronic Low Voltage Single Pole / 3-Way).

Since you don't have a fluorescent fixture at all, the LED strip light option is definitely worth considering.

The challenge with installing an LED strip light in a location like this is that the existing track systems operate at a completely different voltage type and level. Typically, they are 120 volts or 12 volts AC, while the LED strip lights require 12 volts DC.

As such, the electrical wiring and systems inside the track lights will not be useful here and will need to be bypassed completely.

Below is a configuration diagram for a simple LED strip setup:

You will see the TRIAC dimmable power supply, which is the key component here that you will want to determine where you can fit this in your current installation. It is a somewhat bulky device and you will want to ensure it is installed in a location compliant to local electrical code. (Most frequently, it is installed inside of a junction box mounted inside of the wall).

The TRIAC power supply appears to be 9 inches, so it won't fit in the current electrical box in the ceiling. Could I just purchase your junction box and attach it to the ceiling? Do you sell it in white?

Alternatively, I could install the TRIAC in the attic near the switches, but then it would need to feed into the current wires that run to the ceiling position. I'm thinking that those standard wires must be different than the ones needed for the DC, is that right? If so, I guess the TRIAC has to go right next to the strip lights. 

Do you all plan to offer tube lights with 99 CRI soon?

We're not sure about the electrical code requirements and considerations of mounting the junction box on the ceiling, so that is something you will want to confirm before going down that path. The junction box is unfortunately not available in any other colors.

The concern with installing the TRIAC dimmable power supply far from the LED strip lights is that large distances between the power supply and LED strip lights can result in voltage drop, whereby the brightness of the LED strips become diminished by the reduction in voltage supply. Generally, we recommend keeping the LED strip sections within 32 feet of the power supply unit to reduce the impact of voltage drop.

​We are hoping to be able to incorporate our 99 CRI LED technology in our LED tube lights in the future, but we do not have any firm release dates on that at this time.

Difference between Centric Daylight and NorthLux Bulbs?

What is the difference (for an end consumer) between the Centric Daylight and NorthLux 95 bulbs? I am looking at 6500k bulbs.

We're happy to confirm that the CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free A19 10W LED Bulb and NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio products are extremely similar.

The primary difference comes from the D65 standard which the NorthLux A19 bulb is designed to align with. D65 is a global industry standard for lighting products, which some customers who work with photography or art production might find great benefit in. However, the majority of customers may not notice a difference between the two products at all.

For more information regarding the D65 standard, there is a great article on our website that might prove to be useful:

Do you have any LEDs that produce light at 293nm?

Do you have any LEDs that produce light at 293nm? Looking to supplement vitamin D per this article:

Unfortunately, we do not sell LED products that produce light at the 293nm wavelength at this time. We apologize!

Do you have bulbs that have no blue light or flickering?

I am in the process of designing a new home. My goal is to keep blue light and flickering as close to 0 as possible. Do you have bulbs that would satisfy this request?

In the interim, the first product that comes to mind is our 2700K CENTRIC HOME™ LED Strip Lights for Home & Residential product, which is flicker-free when paired with one of our flicker-free power supplies.

Alternatively, we also offer the Lux24™ Circadian LED Bulb product which might be of interest, however, this product is unfortunately not flicker-free.

If it proves to be useful, we also have a great article on our website that discussed blue light in depth:

Blue Light, Melatonin, and Circadian Rhythms:

I am designing a home from scratch and would like to have lights that have no blue light or flickering throughout the home. 

As mentioned in the blog post, blue light can be found within most light sources, including full-spectrum lighting. However, special bulbs such as our Lux24™ Circadian LED Bulb are designed to include as little blue light as possible. Unfortunately, this product is not designed to be flicker-free.

While we are proud to offer many full spectrum lighting products that are designed to be flicker-free, the Lux24 is unique in the extremely low level of blue light emitted. As such, we may not be able to provide any other products that could be ideal for your home design, as well as the specifications mentioned.

High CRI 2700K BR30 LED Bulbs

We need 2700K High CRI in BR30 format for bedroom installation, yet I noticed you don't offer that. Any chance you’ll release a 2700k version? 

Unfortunately, we no longer offer the 2700K color temperature option for our BR30 bulbs at this time. We apologize! 

UV-B LED Lights for Rabbit Shed

It was recommended to me to get Ultraviolet B lights for our rabbit shed to help with their vitamin D. Would it have the same effect to use the ultraviolet A strips you have?

UV-A and UV-B belong to two different classes of ultraviolet light and contain light energy from different wavelength bands. As such, we would not expect our UV-A LED strip lights to achieve the desired effect of UV-B radiation.

Would these bulbs flicker much if there are voltage variances at times?

Would these bulbs flicker much if there are voltage variances at times?

Generally, voltage fluctuations are not desirable for our LED products, and the flicker that they introduce would be quite different from the stroboscopic flicker that our products aim to address.

For example, voltage fluctuations caused by an unstable power grid may result in very noticeable changes in brightness that span several seconds. Our flicker-free products do not have any built-in features that would reduce this effect.

On the other hand, consistent but stroboscopic flicker seen as a flashing, on the order of 60 times or more per second, is eliminated using our flicker-free technology.

What is meant by "enclosed fixture"? And why is this an issue?

You note that the CENTRIC HOME™ Full Spectrum Flicker-Free A19 10W LED Bulb is not suitable for use in an enclosure. Can you explain more about what you mean by an "enclosure" and why this is an issue? Is it a heat issue? I have a circular fixture with a 1/4" opening between the top and bottom plates and the center glass piece. Would this be OK?

Some of our products, including the CENTRIC HOME™ Full Spectrum Flicker-Free A19 10W LED Bulb, contain electrical hardware within the base of the bulbs which is heat sensitive. As such, these products are known to encounter issues when they have been installed within fixtures that do not allow for moderate airflow. 

For instance, a ceiling fixture that is completely enclosed by the glass would not allow for the heat generated by the bulb to dissipate, whereas a wall sconce with an opening would more easily allow for sufficient heat dissipation.

Based on the description provided of the light fixture, you may not encounter heat issues as the fixture appears to allow for moderate airflow. ​

Do you offer full-spectrum LED lights that contain UV-A?

I was wondering whether you sell any full spectrum lights that also contain UVA.

Unfortunately, we do not currently sell UV-A products that also offer full spectrum output at this time. We apologize!

Do you have a commercial high-bay/suspended-type lights?

We are building an addition to our brewery and would like to know if there are commercial high-bay/suspended-type lights for a taproom and brewery space.

Our high CRI and full spectrum lamps sound like. a great option for lighting up a brewery and providing a high-end lighting atmosphere.

For high-bay installations, the first aspect would be to consider what type of fixture you would like to utilize for the space. If, for example, you have existing T8 fixtures, our T8 LED lamps may be a great option for such retrofit applications:

Alternatively, if you do not have any fixtures in place (or if this is for a new build), you may want to consider our hanging shoplight fixtures or our integrated T5 fixtures. These products have LEDs integrated into the fixture, so there is no need to purchase the fixture and lamps separately. Please see below for additional product information:

LED Lights Recommendations for Digital Photo Studio

I'm converting a utility room in our garage to be a dedicated digital photo studio. As such, I know I need much more controlled/accurate lighting. Note, that I do not plan to shoot photos/video in the room, just edit, evaluate, and display.The skylights have remote-controlled blackout shades. My initial thoughts about your products are as follows:

I was thinking of using your 16' LED strip mounted in an aluminum channel on the ceiling ridge, e.g. Centric Daylight strip 5000K. For the LED strips, do your aluminum channels have a system to interlock end-to-end or would you recommend other types of aluminum channels for reasonably diffuse light?

While the linear light fixtures could allow for an easier installation than the LED strip lights, the linear light fixtures are not dimmable. As such, your space might benefit from the LED strip light products, which allow for dimming functionality.

Further, the aluminum channel products unfortunately do not feature the ability to interlock. However, there may be third-party products available elsewhere which would allow for a continuous length of mounted LED light strips for installation along the trusses of the room.

I was thinking of using your FilmGrade Hybrid LED strip mounted in your corner aluminum channels mounted under the bottoms of the trusses in the photo to illuminate the right side wall where I would hang/display prints. How accurate are the hybrid strips in simulating various color temps, etc.? Equally important, what's a simple solution for a controller that would allow me to specify the desired color temperature and it would set the appropriate LED values? Is this doable, what would you recommend?

The FilmGrade™ HYBRID LED Strip Lights could be a great option for your space, and I am happy to confirm that this product can be used to simulate any color temperature between 3200K and 6500K by adjusting the intensity of each color temperature.

However, it might be valuable to know that a LED strip light product featuring a single dedicated color temperature is able to emit more light per foot than the individual colors of the HYBRID LED Strip Lights are able to. For example, the HYBRID LED strip lights emit 225 lumens per foot, per color, whereas the single-color FilmGrade™ WHITE LED Strip Lights emits 450 lumens per foot.

This product can be controlled using several different methods. Though the easiest implementation would likely be to utilize a color tunable LED controller, which would allow for you to easily adjust each color point. The below article contains detailed descriptions for each configuration method available for the product.

How to Connect Hybrid CCT Tunable LED Products:

You sell your T5 Linear light fixtures (D50) in 4 ft. I was thinking of using a couple of those to set up a dedicated print viewing station. Your website says they are out of stock but will ship on 12/14. Is availability still accurate as I would like to go ahead and order them to start experimenting?

We can confirm that the 5000K 4-ft NorthLux™ 95 CRI T5 LED Linear Light Fixture product is currently expected to be available by December 14th. In the event that you would like to place your order prior to that availability date, we would process the shipment as soon as the items become available.

Do all of your 5000K lights actually meet D50 spec or only where specifically indicated?

Not all of our 5000K color temperature products are designed to be compliant with the D50 standard. However, if you had a specific product in mind, I would be happy to review the item to check for D50 compliance.

Anything else you would advise or suggest that I consider?

Regarding installation suggestions, the primary consideration which comes to mind would be to test the LED strip light products within the space prior to cutting the product into segments or installing them completely, as we are unable to accept returns for these products as soon as they have been cut or altered.

Our second suggestion is to keep in mind that the FilmGrade™ HYBRID LED Strip Lights requires a 24V power supply.

Third, the HYBRID LED Strip Lights product has a maximum run of 32.8 ft, and draws a variable amount of power per foot depending on the color point adjustment. Details regarding this can be found on the product specification sheet. As such, you may want to consider a power supply which is capable of outputting enough power to accommodate the power draw needs of the lengths of your installation.

On the FilmHybrid LEDs, I saw the referenced setup with the two dimmers. But to use that, I need to figure out the dimmer settings that correspond to different Kelvin temperatures. I'm assuming to do that I would need to have a spectrophotometer that can measure incident light which I don't have. Is there another 3rd party solution that you could recommend that wouldn't be too complicated or expensive that would allow me specify the color temp and then set the appropriate values on the two LED channels of the hybrid film strip?

Any 3rd party aluminum channel manufacturers you recommend that might have interlocking sections? I'm still going to take a look at yours as well.

Unfortunately, the dimmer uses an analog dial to control the relative brightness levels of the two channels, so there is no way to digitally map the two output levels to a specific color temperature level. You may want to think of this as being similar to a traditional shower faucet, with one for hot and one for cold, without the ability to set a specific water temperature.

We are not aware of any third-party products or solutions that could incorporate our LED strip light to achieve the lighting controls you are looking for, but do hope to be able to offer such solutions in the near future. For the time being, we may recommend searching for cinematography and photography lighting products such as those manufactured by ARRI or Kino Flo, although these will likely be a much higher price point.

I've got a few questions on your 24V dimmable transformer that I purchased:

Is this designed to be driven at 100% rated load (96W) for a prolonged period of time? Is there any issue with splicing a pigtail and plugging it into an outlet (that has an AC dimmer upstream)? Is there a minimum load requirement on the transformer? Any issues if there is a GFI on the circuit?

The 24 volt dimmable power supply load is de-rated at 100% (full 96 watt capacity) until ambient temperatures exceed 105 F. Maximum allowable ambient temperature is 140 degrees F, at which the power supply output load is de-rated to 60% (59 watts capacity).

​We do not maintain a minimum load requirement on the power supply unit, but all dimmer tests are performed at 85% load.

With respect to your questions regarding installation through a wall outlet and the use of GFI components, I would consult with an electrician for further recommendations. From what I understand, there may be code compliance issues arising from:

The installation of a dimmer switch on a power outlet (e.g. what happens is someone inadvertently plugs in a non-dimmable, non-lighting appliance into the "dimmable" power outlet?)Installing hard-wired products into a wall outlet using a spliced plug cord.

From a pure electrical standpoint, I do not believe there would be any performance issues, but such installation methods would be beyond the scope of our safety and reliability assurances.


Recommended LED Lights for Basement Fluorescent Replacement

What would you recommend for me to improve lighting in my basement family room? At present, there are 2 four foot long fluorescent long outlets (2 bulbs each) installed in the 80's. We like reading and I like to draw. I am more aware now about the necessity of healthy lighting choices. 

We've reviewed your requirements for your basement, and understand that you have two primary concerns:

​(1) Increase of daylight-like lighting to use during the day, due to the limited amount of natural daylight available in a basement.

(2) Reduction of blue-light intensity during evening hours to reduce impacts on melatonin and circadian rhythm cycles.

Blue light vs natural light can get a bit tricky, since natural light has lots of blue light, and it is not so much the case that "blue light is bad" but "blue light during evening hours can be bad."

For additional background reading, you might find the following article helpful:

Recommended LED Lights for Building a Tower Floor Lamps

Building tower lamps pseudo shoji style with lighted section 34" high behind a 5.5" sheet of acrylic on all four sides. Either white or a remotely adjustable color would be kind of cool. Could you recommend your products I should look at? 

It's a bit difficult to provide exact recommendations given the unique nature of your lamps, but it does sound like our high CRI LED strips could work very well for you. The LED strips are offered in a wide range of color temperatures, all of which offer 95 CRI or higher, providing excellent color quality both highlighting the Shoji material as well as illuminating the surrounding area.

Unfortunately, we don't have any solutions for remotely controlled color temperature, though that is certainly something we would like to see implemented in the near future!

If the floor lamps are for residential and home use, we would generally recommend our 2700K and 3000K options, which I have linked to below:

For commercial or office spaces, you may want to consider a higher color temperature such as 4000K or 5000K:

Do you have 220V-rated bulbs?

I see that all your bulbs are rated 120V, although the tubes are 110-277V. Is it possible to get 220V-rated bulbs? 

We do offer several 220-volt compatible A19 lamps. For example, please see below:

LED Panel Lights for Home Office Lighting

The space my wife and I use as a home office was originally designed as a sun porch. There's a single, small fixture in the middle of the room that provides very poor lighting to our desks. I was thinking of installing a surface mount LED panel (because the ceilings are relatively low) over each desk, but it's difficult to find LED panel lighting with >80 CRI. I'm looking for something that mounts close to the ceiling, is dimmable, and relatively long (to provide even lighting across a desk).

We unfortunately do not have any LED panel lights, and the requirement for dimmability makes this quite challenging based on the offerings we currently have available.

If you're willing to forego dimmability as a requirement, our T8 LED lamps housed in an appropriate ceiling fixture, or our T5 linear fixtures, could potentially be viable solutions for you. Both are available with 95 CRI and provide excellent light quality that should work well for a home office.

​I've included product links for these products below:

FilmGrade A19 LED Bulb 3000K Spectrum Chart

Can you please send me the Spectrum Chart PDF for this item: FilmGrade™ Flicker-Free A19 LED Bulb

Below is a link to the photometric report for the 3200K FilmGrade™ Flicker-Free A19 LED Bulb product (PN 4005.30).


Do you all have plans to make any G16.5 bulbs or other common household bulbs?

Unfortunately, I am not aware of any plans to introduce other bulb standards, such as the G16.5, to our store at this time.

I’m confused about the PDF. It seems to be the exact same pdf as the centric 3000K. Is there no difference on the spectrum and CRI levels? Specifically looking at R9...

The identical data is due to the fact that the 3000K FilmGrade™ Flicker-Free A19 LED Bulb product is identical to the 3000K CENTRIC HOME™ Full Spectrum Flicker-Free A19 10W LED Bulb. This can be noted by the shared part number of PN 4005.30. As such, while there may be extremely small differences between individual bulbs, the performance can be expected to be the same for both items.

We do apologize for any confusion which may have arisen by this, as these products are displayed on multiple pages for marketing purposes.

Is there a Flicker-Free BR30 option? I guess the idea is 6% is close enough. 

We can confirm that our BR30 bulbs are not currently flicker-free, though they do offer a lower flicker rate than many similar products on the market.

LED Lighting and Dimmers for Laundry Room Lighting

I'm hoping you can help me a little with my laundry room lighting. Here are the specs: basement location - 1 small window in a well (almost no natural light). Room is 7.5' by 11.8', ceilings is 7.5' high (currently lit by a 4 t8 tube troffer fluorescent light in a drop ceiling). Block wall is off white -all wiring is surface wiring in conduit. 

Our high CRI LED products sound like a great fit for your retrofit installation, and the use of our LED strip lights in your fluorescent fixtures sounds like a great idea.​I don't foresee any issues from a performance perspective, but if there are any electrical code or inspection concerns, we would recommend confirming that this is a permissible installation method as regulations can differ depending on the specific inspectors as well as authorities having jurisdiction.

One alternative option would be to keep the fluorescent fixtures in place and utilize our T8 retrofit lamps, which offer the same level of color quality.

Should I use 2 strips or 4 by my calculations 4 would be giving me almost 8000 lumens, and this is not a baseball field. Will 2 strips look like 2 long blobs up there? or will I have even light over the troffer? 

I inputted the provided room dimensions into the lumen estimation calculator ( Based on a target of 60 footcandles (which should provide you with a very nice level of brightness for most laundry-related tasks without being overly bright), the recommended lumen output for the lights would be approximately 6000 lumens.

​Your calculations are correct that four 4-ft rows of the LED strips would provide you with approximately 7200 lumens (450 lumens per foot * 16 feet). I do not think this is an unreasonable amount of light, especially if you have a troffer diffuser that will reduce the light output a bit.

I'm a little confused about dimmer options...I see that you have a triac dimmer compatible power supply. Are all wall dimmers triac? or just the standard incandescent ones. Do I still need to get an LED or other specialty dimmer from Lutron etc...i.e. low voltage electronic dimmer?

Most wall dimmers utilize TRIAC phase dimming, and our TRIAC dimmable power supply is compatible with most standard residential wall dimmers. Some of the most commonly seen wall dimmer brands include Lutron and Leviton. Please see below for a list of dimmers which we have tested compatibility for:

 I was thinking I would use the 24 v option since I might like to run some of the strips in the hallway outside the laundry room and that would require a little more distance between the power supply and strip light. Does that make sense? I will be having an electrician do the actual installation.

Generally, 24 volts is almost always a better option when running longer wire connections. This is because a higher voltage option requires lower amperage, which is typically what causes voltage drop issues. For additional information on voltage drop, please see our article below:

In order to connect my troffer strip to the next strip out in the hallway, I would use your 16 gauge wire that you sell by the spool, I believe. Would I be using the strip to wire pigtail connector that you sell? If so, how do I join the two wires? wire nuts in a junction box? or is there a way to solder the wire to the strip at either end and add a cover for protection?

The best way to accomplish this connection would be to use our PN 3070 solderless connector, joined to the 16 AWG wire using wire nuts. Please see the screenshot below, taken from the layout maps found at this link:

You may of course also forgo the PN 3070 component and solder the 16 AWG wires directly onto the LED strip copper pads as needed.

Also, is it possible to buy smaller quantities of the various connectors? I don't want to buy 10 if I only need two.

Unfortunately the connectors are pre-packaged packs of 10 and we would have no way to offer just two of them. Sorry for the inconvenience!

How can I determine if the lights are suitable for outdoor use?

How can I tell if any of the lights you offer are suitable for outdoor use? Do you have any plans to offer a G9 bulb type anytime soon? I have some in my bathroom and they're garbage, but I love the look of the fixture. I'd like more high-quality bulbs for that! (Flicker issues, and their 3000k looks greenish). 

The information regarding compatibility with outdoor installations or IP ratings can be found within the product pages, or within the specification sheet PDF documents which are present on the product pages. That being said, please note that the majority of our products are not designed for outdoor use, or for installations where they may come into contact with water.

A notable exception is our realUV™ LED Flood Light product, which has an IP65 rating.

However, if there was a specific product that you had in mind, we would be more than happy to check on the compatibility with outdoor installations.

Further, we do not currently have plans to introduce a G9 bulb type at this time. 

Flicker-free and Non-dimmable Recessed Light Bulbs

I see you have the BR30s but do you know where I can get the Zero flicker, non-dimmable recessed light bulbs?

We unfortunately are not aware of any BR40 lamps that feature flicker-free light output.​One alternative would be to consider our BR30 lamps, which have a 3.75 inch diameter. The gap between the lamp and the ceiling fixture rim may be on the larger side, but the lamps will fit in the fixture without any issues.

E26 vs E27 bulbs - Are they interchangeable?

I read your blog entry on the interchangeability of E26 and E27 bulbs ( with interest. In the Bottom Line section, you state that "E26 bulbs should not be used in E27 sockets. I live in the US, and recently received a nice lamp as a gift from a UK relative. I can swap out the wall plug relatively easily, but the bulb holder is of a strange design that's difficult to remove/replace. Since I'll only ever be using E26 bulbs here on 120V AC, from an electrical safety perspective, I should be OK, right? 

While we cannot guarantee or be liable for any safety concerns, our general understanding of lamp fixture design would suggest that using your E26 lamps in an E27 fixture at 120 volts would be a lower safety concern than doing the same at 240 volts.

Flicker-free LED lights for Golf Simulator System

We plan to install a Uneekor EyeXO golf simulator with 2 high-speed cameras. Uneekor has recommended I install at least 8 15-watt or higher non-flickering LED track lights to provide adequate lighting to avoid blurring of the images during the golf swing. 

We don't currently have any track light fixtures, but you may want to consider several of our flicker-free lighting options to ensure that your golf simulator system is able to accurately capture high-speed images.

Our A19 products are rated flicker-free and may be the easiest product to install and set up, as it is a standard screw-in light bulb that can be used in a standard lamp fixture. Please see below for the product link:

How many of these installed in track lighting fixtures would be necessary to provide adequate lighting to capture the high speed images? The picture in the Optics attachment on page 10 shows 3 track lighting fixtures with 11 lights distributed among them.

It's a bit difficult to provide a definitive answer for brightness requirements, as this would depend on the camera system and the various light sensors used in the golf simulator.

One way to do a comparison against their recommendation is to compare lamp power. Our LED lamps are 10 watt lamps, so to achieve the same power level as the 8x 15 watt lamp recommendation, you will need at least 12 lamps to reach the same amount of power (8 lamps x 15 watts per lamp = 120 watts).

However, since our lamps are omni-directional, you may not see as much perceived brightness directed towards the golfer, compared to the track light lamps which tend to be more directional. As such, it may be beneficial to increase the power budget further to ensure sufficient brightness.

We would perhaps recommend testing and taking advantage of our free returns policy. If for whatever reason you find that the LED bulbs are not going to work for your project, we would be more than happy to pay for return shipping and offer a full refund. 

Do I want the A19 in 6000K?

Both the 6500K and 5000K should work fine for your needs, as both are calibrated to natural daylight and your camera system should have these calibrations built in. The color temperatures correspond, roughly, to north-facing daylight for 6500K, and direct noon sun for 5000K.​Both options offer 95 CRI and flicker-free light output and therefore should serve well for the application.

High CRI 93 LED Lighting for Residential

I am interested in bulbs with at least a 93 CRI. I see that you sell them. I would like to know what would be the best bulb for my family. The new bulbs sold in stores that are supposedly 60 Watts are not bright enough. What would be recommended and why is that your choice? 

Our 95+ CRI lamps sound like a great fit for you and your family. Our most popular option for residential installations is our CENTRIC HOME A19 lamps, which are available in a 60 watt equivalent brightness. The 2700K and 3000K color options are both excellent options for home use.

Below is the product page for the CENTRIC HOME A19 bulbs:

For more information concerning color temperature, please see our article below:

The new bulbs sold in stores that are supposedly 60 Watts are not bright enough. I see you recommended your Centric Home A19 bulbs. Does this seem brighter than the 60 W bulbs I could buy at the store and if so, is that due to the CRI? Why is that your choice to recommend? How many bulbs come in 1 pack?  

The 95 CRI bulbs will most likely provide the same amount of perceived brightness as an 80 CRI bulb that also emits the same amount of brightness (i.e. 60 watts). However, because the CRI is higher, a lower amount of brightness may be sufficient for task-oriented activities, as the improved color clarity may counteract the need for additional brightness.

​We unfortunately do not have any higher brightness bulbs so this would our best recommendation. Generally, we recommend increasing the number of lamps, rather than the brightness of any individual bulb, as this can help reduce glare and improve the light distribution in a space.

The 1-pack refers to 1 bulb.

​We would perhaps recommend testing and taking advantage of our free returns policy. If for whatever reason you find that the LED bulbs are not going to work for your project, we would be more than happy to pay for return shipping and offer a full refund. 

Do BR30 and A19 bulbs dim properly with older-style dimmers that adjust voltage?

Do BR30 and A19 bulbs dim properly with older-style dimmers that adjust voltage? Do the bulbs make a humming noise when dimmed with the older-style dimmers?

We can confirm that our A19 and BR30 lamps are designed for use with modern phase dimmers. However, they are not designed for use with older dimmers such as rheostat dimmers.

As such, these products may not be compatible with the dimmers that you have installed. We might recommend reaching out to a local lighting expert for further specialized instruction regarding compatibility.

Chandelier and Strip Lighting Recommendations

Have two 12-light chandeliers in a 51 by 25 room with 17-foot ceilings. Think 60-watt equivalent is OK. Room with multiple oil paintings and Persian rugs. Also about 110 feet of indirect strip lighting. 

Based on our calculations using our Lumen Estimation Calculator tool, it would appears that a room of the dimensions provided would benefit from a total of 107,358 lumens in order to be properly illuminated.

Does the back section of Northlux BR30 bulbs emit light or is it sufficiently coated?

Does the back section of Northlux BR30 emit light or is it sufficiently coated that if in an exposed track head, no light escapes? I want to use it in heads that don't have baffles that would limit the spread of the light. 

We're happy to confirm that the bases of our BR30 bulbs are enclosed in an opaque white plastic shell. As such, no light should be emitted from the base of these products while they are in use.

Do you have Mini-Candelabra Bulbs?

I was wondering if you guys were going to offer mini candelabra bulbs in the future? I'm going to be in the market to replace the incandescent bulbs I have and wanted to also use your bulbs. 

While we do not have plans to offer the mini candelabra bulb size at this time, we would be more than happy to pass along your interest in the product to my team for future consideration.

Could you suggest any circuit modifications of resistive ballast to prevent flickering from dimming?

I have 6 lights (5W dimmable 2700k A19) on a Lutron CL LED-approved dimmer. I have added 10W of resistive load in parallel to try and prevent flickering from dimming but the lights still have an inconsistent brightness level as they dim up and down. I was wondering if you could suggest any modifications to the circuit to improve the stability. I have also tried it with and without a capacitive load added as well of about 130uF. 

Unfortunately due to variations in dimmer products and configurations, our ability to provide a specific solution in terms of connecting resistive loads here may be quite limited.

Do you have a high CRI dimmable R20 Flood Lights?

I'm an artist replacing my incandescents with LED in my studio. An artist friend recommended Waveform. My track lights are R20 size. I'd like high CRI floods, and I'm thinking that 4000K would be a good balance between the warmth of the 2700K and the coolness of 5000K. They need to be dimmable. I'm hoping you have something, but I wasn't able to find this on your website.

While we currently do not offer R20 bulb sizes at this time, we would be glad to let my product team know about your interest in the product for future consideration.

Do you have a Halogen Puck Light?

Do you sell or have any details on the halogen puck light pictured on the following webpage: I currently have these lights and am looking for the replacement covers.

Unfortunately, we currently do not have any puck-style LED light products available.

However, I would be more than happy to pass along your interest to our product team for future consideration.

LED Lighting Suggestion for Photography

I am looking for an equivalent of 50 W bulb D65 to screw in (for a dim room lighting 8'x13'x8'), another one around 75-80 W D50 also to screw into my desk lamp to hard proof my prints, and another one of around 3700K also for prints evaluation. 

While we, unfortunately, do not offer D65 bulbs that would into traditional lamp fixtures, we do offer the D65 ABSOLUTE SERIES™ LED Linear Module product, which might be an alternative depending on your installation.

We also offer the D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) product, as well as the D50 5000K T8 LED Tube Lights for Color Matching (ISO3664:2000) product, which may also be worth consideration. However, these D50 calibrated products are currently only available in the 5000K color temperature.

If I understand correctly, your lights are “full spectrum” eg 6500 K seems to be not far away from D65. Would it be wrong, if my display is on D65, to use one of your bulbs for my ambient light? centric? Northlux? Ultrahigh 95 jewelry? Avian? I do not see any difference between them except that one of them is Flickr-free but same price. 

If this does not work (800 lm could be too bright), and those LED are not dimmable without any further installation, another option could be bias lighting. I have an NEC PA302W: it is a 27.1 x 18 monitor on a stand. Should I use the sidewinder reels? How many? I understand a portion of 24” horizontally, and half of a foot on both sides with 1 reel. Will it be OK like that? Will it be necessary to use a dimmer? I have a black curtain on my window, so it is pretty dark when the door is closed.

We're happy to confirm that the majority of our products are indeed a full spectrum.

Further, we can also confirm many of our products are quite similar. If you have a specific set of products in mind to compare, I would be more than happy to explain the differences between them.

Regarding bias lighting, the Sidewinder™ LED Flex Strip for D65 Bias Lighting product could be a great option for your space.

Based on the measurements provided of your monitor, we recommend two 3.2 ft (1 meter) units of the Sidewinder™ LED Flex Strip product to wrap the back of the display in lighting, depending on the layout that you choose for installation.

This product can also be paired with a dimmer, in the event the level of the emitted light is too bright for all use cases. We recommend pairing this product with the 24V DC power supply, as well as the FilmGrade™ Flicker-Free LED Dimmer product.

I am looking for a D65 bulb for the ceiling but that will be probably too bright as ambient light and this will send some light directly to my computer screen. Moreover, they are non-dimmable or necessitate an installation too complex for me. Anyway, there is a bulb over there, and I will choose one which is adapted; I am a photographer. Flicker-free? 

1. What is the difference between the lights?

Based on the details that have been provided of your space, the A19 bulb that I would primarily recommend would be the 6500K NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio product, which was designed to be D65 Illuminant-compliant. This means that the product strictly aligns with a global standard designed for color work. However, please note that while many of our A19 bulbs are flicker-free, none of the A19 bulbs previously mentioned are dimmable. As such, these products may not be beneficial for your space.

That being said, we can confirm that some products are indeed the same item, such as the CENTRIC DAYLIGHT™ A19, as well as the Ultra High 95 CRI A19 bulb. This can be noted by the shared product number, listed as PN 4005.65. This is also true for some other products that we offer. 

​We do apologize for any confusion which may have arisen, as these products appear on multiple pages for marketing purposes.

2. How to connect the 2 strips: daisy chain? connectors?

We're happy to confirm that the Sidewinder™ LED Flex Strip product is designed with plugs on each end of the reel, which allows for the product to be daisy-chained together without additional hardware. I have attached a photo of the product, which may prove to be helpful. That being said, please note that a compatible 24V DC power supply, such as our FilmGrade™ DC Power Supply for LED Strip product, would still be required.

3. What do you mean about “depending on the layout you choose for the installation”?

We do apologize for any confusion caused by my wording. Some bias lighting is installed as one horizontal strip behind the monitor. If this was the installation that you would prefer, we might recommend one unit of the Sidewinder product.

Alternatively, we have seen other bias lighting installed as three strips of lighting. Two vertical strips are applied to the back of the monitor parallel to the sides, and one horizontal strip is applied to the back of the monitor which runs parallel to the top. If this is the installation that you would prefer, we might recommend two units of the Sidewinder product.

LED Lighting Suggestion for Small Townhome of 1200 sq ft

Could you suggest a type of LED lighting for a small townhome ~ 1200 sq ft? I have 9 led lights in my downstairs and the room takes a pink/peach hue. I have white walls and want everything crisp, but cannot find a good brand or light.

Our high CRI LED lights should be a great fit for your home.

The first step in determining your lighting needs would be to understand the amount of brightness and the number of lights needed. Based on the square footage provided, we ran some quick calculations using our lumen estimation calculator ( which suggests approximately 26,000 lumens as your target brightness level.

​We would further recommend a 3000K color temperature which will provide your residential space with a comfortable but crisp white, light.

Full Spectrum LED Light for Car Repair/Restoration

30 ft. X 40 ft. with 12 ft. ceiling. All white inside. Used for car repair/restoration. Need light to reach under car lift. Did I do the calculator right? 120,000 lumens? The full spectrum is nice. 

I have attached the store links below for the products which were discussed during the call. If you could provide further details about the space, we would be more than happy to provide some more specific product recommendations as well as product quantity suggestions.

The NorthLux™ 95 CRI LED Shop Light Fixture was the primary product which was discussed. Although this item is currently back-ordered until February, this integrated fixture can be easily hung using the included chains and hooks. This product can also be daisy-chained together for easy installation.

In the event that you would prefer to use mounted ceiling fixtures which utilize tube lighting, we might recommend the CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free T8 LED Tube Light product.

For the installation which was described, we recommend the 5000K color temperature option. The light which would be emitted by 5000K light sources would be neutral, balanced, and very similar to natural daylight.

Does Full Spectrum Flicker-Free A19 LED Bulb Emit High Levels of EMF?

LED lights are known to emit high levels of EMFs and also produce dirty electricity. Can you tell me more about this regarding these light bulbs?

We do not have any EMF measurements on our lighting products at this time. We can verify that they are flicker-free, however, with a flicker % of less than 2%.

So you mean to tell me someone can call something "flicker free" even though it still has a flicker?

The official threshold for our flicker-free products is 2%. In actual tests, our flicker % is at 0%. For example, see below:

Do you have a 2020 P1500 LED Grow Light?

I have a 3x5 foot area to grow in which light will produce the best flower the 2020 P1500 @ $139 or 900w @ $239? I have 2 of the 900w units but I see the new 2020 series and was wondering how they compare.

Unfortunately we do not have any products that would be comparable to the 2020 P1500 LED products. Sorry!

LED Lights for Textile-Dye Color Matching

I am looking for a lightbulb that will give me the most accurate color reading in my fabric restoration work. I use dyes to restore color loss on carpets and rugs and need to be able to match perfectly the color of the original to the spot I am touching up. What would be the best product for this?

We recommend the D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) product. This product features a high CRI, is flicker-free, and is D50 calibrated for color-critical work which might be valuable for your purposes. We also have a great blog post on our website regarding D50, which I have linked to below in the event that it is useful.

What is D50 for graphic arts & printing?:

​However, please know that offer a 30 day return policy. In the event that one product winds up being preferable over another, simply let us know and we would be happy to issue a free return label for your refund. 

Difference between D50 and Centric Daylight

What is the difference between the D50 and the Centric Daylight?

While both the D50 and CENTRIC DAYLIGHT products offer a 5000K color temperature, the D50 products are calibrated to a specific ISO color point for color viewing applications. For more information, please see below:


LED version of the MR16 CRI>95

Do you have any plans to make an LED version of the MR16 CRI>95?

We do not have any immediate plans for an MR16 product, but we do hope to offer such a product in the future!

Do you sell Absolute Series LED Products?

I'm looking for an LED to use in a measurement tool that we're building internally. We found your ABSOLUTE series which, looking at the spectral characteristics would be a great fit, due to the uniformity of the spectrum and how quickly it ramps up around 400nm. Do you sell individual LEDs with these characteristics? And if not, how viable is it to buy a strip and desolder them? Can you provide some technical information on these LEDs - like the physical dimensions of individual ones, their electrical characteristics, etc? 

We unfortunately do not sell the individual emitters on our ABSOLUTE SERIES LED products, and correspondingly, we do not provide any technical documentation on the LED emitters.

While I unable to provide any further guidance in an official capacity, I can attest to having de-soldered some of the LEDs from the LED strip lights and can share that it is definitely doable if you are able to heat up the substrate sufficiently.

​Furthermore, you should be able to reverse engineer the drive current information by looking at the resistor values used on the LED strip lights. Below is an article that might help:

Questions with 7200 Series 100W COB LED - 95 CRI Full Spectrum

I have a few questions about your 7200.65 COB which I'm hoping you can answer. 

Q1: If you dim this COB using for example the Meanwell HLG-120H-30 (using PWM) will this then change the color temperature and/or the CRI? 

Q2: If Yes to the above: How can one dim the LED without sacrificing color temperature and/or CRI? 

Q3: Is it possible to change the color temperature? - does this require a change in voltage or current or both? 

Below are answers to your questions:​If using PWM, there will be no changes in CCT or CRI. The reason is that by pulsing the LED on and off, the CCT and CRI performance remains the same during the "on" period, and therefore even with dimming, there will be no changes to the color quality.​It is not possible to change the color temperature, as it is a fixed color product. Reducing the input current (non-PWM) may affect the color temperature slightly, but the difference is typically well within 100K.

Brighter and Bluer Light for Home Office Lighting

I'm working out of my home office, I would guess the brighter and bluer I can get my room the more productive and alert I will be, no? I filled in the blanks in your lumen estimation calculator and it recommended a color temp of 3249k to 5585k. 

You are correct that increasing the blue content of a light source will generally provide increased alertness, and that 6500K would be the best color temperature option to achieve this.

​I've taken a look at the lumen estimation calculator, and it does appear that the recommended range of color temperatures would be between 3249K and 5585K if you were to stay at a lower brightness level (it looks like you entered 41 footcandles as your brightness needs).

If you did want to go with 6500K and create a comfortable space, we would recommend increasing the brightness levels to at least 50 footcandles.

The reason for this recommendation is due to the relationship between brightness and color temperature, for which we recommend ensuring that the space is optimized for. Below is an article that explores this concept in a bit more depth:

Recommended LED bulbs for Sputnik Chandelier Fixture

I have a sputnik chandelier that has 18 lights. The edison bulbs pulled too much energy and overheated the dimmer. I switched to LED but the lumens are so high it's BLINDING even on the lowest setting. These look like a great replacement bulb. What do you think?

Based on the description provided, we believe that the Ultra High 95 CRI A19 5W LED Filament Bulb for Home & Residential product could be a terrific fit for your sputnik lighting fixture.

However, please know we offer a 30 day return policy. In the event that these bulbs wind up not working well with your installation, simply let us know and we will promptly issue a return label.

Recommended LED Lights for Seasonal Affective Disorder (SAD)

I am considering buying daylight lighting, to combat potentional Seasonal Affective Disorder. I was wondering if you have had other customers purchasing lamps with this goal and about their experience with 4000K 5000K 6500K options?

We certainly have had customers purchase our lamps in order to treat SAD. We do not have any technical documentation or test results specifically addressing the treatment of SAD symptoms, however, so we are unable to make any medical claims as far as its efficacy is concerned.​That being said, the lighting science and theory would suggest that our 95 CRI lamps would be an excellent candidate for SAD treatment by virtue of the spectral similarity to natural daylight. We have seen that our 4000K and 5000K color temperatures are generally the most popular, while the 6500K is also a nice option which features rich blue light content that is similar to what is typically found in the north-facing sky.

Do your flicker-free LED bulbs produce EMI?

Do your flicker-free LED bulbs produce EMI or are they also EMI-free? Also - it appears your low Blue light filament bulb is not flicker-free - is that correct? If not flicker-free, what percentage of flicker does it have? 

We, unfortunately, do not have any technical data on the EMF emissions of the product this time.

Our Lux24 filament bulb is not flicker-free and has a flicker rate of approximately 15-30%.

LED Light Bulbs Rated for Enclosed Light Fixtures

I am wondering if you sell any light bulbs that are rated for an enclosed light fixture. 

We're happy to confirm that our Ultra High 95 CRI A19 5W LED Filament Bulbs and our Lux24™ Circadian LED Bulb - 2400K 95 CRI E26 A19 LED Filament Bulb products are compatible with enclosed light fixtures.

Are NorthLux™ 95 CRI T8 LED Tube for Art & Studio Dimmable?

Are these dimmable? NORTHLUX 95 CRI T8 LED

Unfortunately, the NorthLux™ 95 CRI T8 LED products are not compatible with dimmers.

Just need to know which LED lamps you have that are dimmable and are at least 5000K

We can recommend our Full Spectrum E26 BR30 LED Bulb product, which is dimmable and available in the 5000K color temperature.

Here is the product link:

Do you supply recessed integrated LED CRI 95 Lights?

I will be getting 5-6 recessed ceiling lights installed in about 10 days. Kitchen being remodeled for accessibility due to vision impairment I am looking for quality recessed integrated LED CRI 95. Do they exist? Or only as bulbs? I am also looking to have the tone to be adjustable. I prefer warm when not doing a task. 

Unfortunately, we currently do not offer any integrated LED light products which match the description provided.

UV Light Bulbs in E26 Base to Restore Yellow Plastic to Clear

I know this sounds weird but I have been scouring the www to find ways to restore yellowed plastic sections of a tube-style bird feeder that is no longer made. It seems like soaking in hydrogen peroxide or slathering the plastic with a beauty salon product containing peroxide and then exposed to UV light will do the trick. Sun is at a premium these days here so I am wondering if I can find the right UV bulb (standard base) I can use in a small, otherwise dark room. Can you suggest something?

Unfortunately, we do not have any UV bulbs in a standard E26 base. The easiest alternative option would be our flood lights, which can plug into a standard wall outlet. Please see below:

Would full-spectrum light help night worker?

My brother is in NY for a month but he has a job 7 time zones away, which means he has to start work at 2 AM (his job ends at 10:30AM). So he goes to sleep at 6 PM. I was wondering whether a full spectrum bulb in the early hours would help his biological clock. In other words, would it create a daylight-like morning for him as he works the few hours before daylight.

Our lamps are indeed designed to mimic the natural daylight spectrum, and therefore our products would be a great fit for your application. While we aren't able to make any medical claims as far as your brother's biological clock and circadian rhythms, our lamps will indeed provide a lighting environment similar to morning sunshine (especially our 4000K color temperature).

Light Color Spectrum Behind a Prism

I'm doing research for an art installation. With your lights, if I put the behind a prism, will it diffract the entire color spectrum to see the rainbows?

Because our products are designed with a CRI higher than 95, it means that they provide full spectral coverage and emit full spectrum light which is extremely similar to the spectrum of natural daylight.

As such, if our lighting products are placed behind a prism, the light refracted by the prism should produce an effect similar to what you would see with natural daylight.

Do you have E14 Lamps?

Due to decreasing availability of incandescent light bulbs your product is truly interesting. However, at least in my corner of Europe, most bedroom lamps need bulbs with E14 screws. Is there something like that available? Or maybe some convertor or smth?

Unfortunately, we do not offer any E14 lamps, but you may be able to find some adaptors in any third-party retailers like Amazon.

Do you have a smart bulb that will work with: WiFi Google Assistant?

Do you have a smart bulb that will work with: WiFi Google Assistant? Ideally, no hub is necessary, 5000, 5500, 6000, or 6500K, and CRI (high): 90-97?

Unfortunately, we do not offer any smart bulbs at this time. We're still working through some of the technical challenges of creating a wireless product that meets the security and safety requirements, which can be quite difficult when bridging across multiple connectivity protocols.

Healthier lighting for dark apartments

I live in an apartment which has no natural light. I want some healthier lighting as we approach winter to brighten up my living area during the daytime. Which product would your recommend?

We're sorry to hear that you apartment doesn't get much natural light! Those winter months, especially at the northern latitudes, can definitely get dark and gloomy.

We designed our CENTRIC SERIES™ LED bulbs with a focus on full spectrum (high CRI) and flicker-free light output. We offer the CENTRIC SERIES in both the DAYLIGHT as well as HOME options, which correspond to the daytime color temperatures of 4000K, 5000K and 6500K, and popular nighttime color temperatures of 2700K and 3000K.

Since you're looking for supplemental lighting during the day, we would recommend our CENTRIC DAYLIGHT series bulbs. 5000K is our most popular as it offers a nice balance between morning sunshine (4000K) and blue sky (6500K). All of our CENTRIC SERIES LED bulbs are completely flicker-free.

If you need to determine the number of bulbs you need for a bright enough space, we recommend checking out our lumen estimation calculator. By plugging in the dimensions of your room, you will receive a general recommendation on the number of bulbs you need.

Difference between natural "daylight" vs natural "sunlight"

I see that you characterize the difference between 4000K/5000K and 6500K bulbs as being similar to the difference between natural daylight and natural sunlight. I'm still unclear on what the difference is between daylight and sunlight?

Daylight would be the clear, bluish light coming in through a north facing window. No direct sunshine coming in, just the light from the crisp, blue sky.

Sunlight, on the other hand, has a warmer, yellower quality to it -  imagine the soft, early morning sun rays streaming in through your windows.

Some of our customers prefer the warmer "sunshine" look of our lights (4000K/5000K) while others prefer a crisper, whiter "daylight" look (6500K). Unless you are working in an industrial or color-critical environment, this decision is completely up to you and a matter of personal preference!

With respect to color temperature selection, you might find the following infographic useful:

What LED bulbs does Waveform Lighting offer?

We offer LED bulbs in A19, A21 and BR30 form factors. A19 and A21 bulbs replicate the traditional pear-shape used in incandescent lighting, and emit light in an omni-directional pattern. BR30 bulbs are designed to replace incandescent flood lights, and emit light in a more directed fashion, and are great for use in ceiling fixtures of 4" or more.

These types of bulbs all use E26 and E27 screw bases, which makes them compatible with a wide range of traditional lamps and fixtures.

The brightest bulb we currently offer is the 1600 lumen, 100-watt equivalent A21 bulb.

Currently, our A19 filament-style bulbs and BR30 lamps are the only dimmable LED bulbs we have. They are compatible with most wall-dimmers. Our product development teams are currently working on developing dimmable versions for our A21 100-watt equivalent bulbs.

Does Waveform Lighting offer lighting design services?

We are wondering if you provide lighting design and planning consultations for our new home construction project. Can we send you plans for our home and discuss lighting options?

Waveform Lighting does not provide lighting design services. Our primary focus is on developing and manufacturing high quality lamps and fixtures, and as a result, developing a customized lighting installation proposals for residential and commercial projects is unfortunately beyond the scope of our work.

We would of course be more than happy to answer any technical product questions and provide general recommendations about light and color, but we would recommend reaching out to a certified lighting designer using the IALD directory.

Best A19 bulbs for digitizing and photographing paintings and artwork?

I am a painter, and am considering using your NorthLux™ A19 bulbs to take photos of my artwork pieces to showcase on my website and other platforms. I am hopeful that these bulbs will reduce the amount of color correction needed post-capture. Are these the best bulbs for my needs?

Our NorthLux™ A19 lamps do indeed sound like a great option for your painting photography. These bulbs feature 95 CRI and daylight calibrated light output, which means they are perfect for image capture without any loss of color accuracy. Because the light source is fundamentally calibrated to full-spectrum daylight, there should not be any need for white balance or color correction adjustments.

The NorthLux™ A19 lamps are offered in 5000K and 6500K. Although both color temperatures can be considered to be daylight calibrated, 6500K will have a slightly blue hue in line with what you would see from a north-facing window, while 5000K will be more neutral, closer to direct sun. Here is an article going over some additional differences between the two color temperatures. Most camera systems will have a color balance calibration setting that allows for the subtle adjustments that may be needed between these two color points.

Alternatively, our FilmGrade™ 5600K A19 lamps may also be of interest. These lamps are calibrated to 5600K (and 95 CRI, of course), which is a mid-point color temperature between 5000K and 6500K. The 5600K color temperature is calibrated for use in photography, film and TV studios, but can be an equally effective and accurate light source for the purposes of digitizing artwork.

​The A19 / E26 form factor ensures that these lamps will fit in virtually all standard bulb fixtures, so this will give you lots of flexibility and room to try out different positions and orientations to get the optimal set up!

Best bulb for viewing prints and color accuracy?

I am looking for a daylight-calibrated LED bulb that fits into a regular table lamp to view prints. Color accuracy and D50 white balance is crucial. What do you recommend?

Our D50 calibrated, 95 CRI LED lamps sound like a great fit for your needs!

For a basic table lamp with a medium-size (E26) screw base, our D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) product would be the best fit. This bulb is calibrated to the D50 standard, which would be perfect for print viewing and color accuracy.

How do I know how many bulbs I need for my space?

One of the most fundamental questions before embarking on a residential or studio lighting project is knowing how much light is enough? We've all had experiences where it's just too dim to see properly, so under-estimating the amount of light needed is an obvious concern. Installing too much light, on the other hand, can also be problematic, as this can lead to uncomfortably bright spaces and unnecessary expense.

One resource we offer at Waveform Lighting is the Lumen Estimation Calculator. This calculator will ask some basic questions about your space, such as the physical dimensions as well as the brightness needs (e.g. residential space or an art studio, or something in between?)

Based on these inputs, the calculator will provide an estimated "lumens" recommendation. This is the total amount of brightness that would be appropriate for a particular space, given the details inputted. From there, various lighting options can be explored, given the total amount of brightness required.

realUV LED strip lights for screen printing

I’m making my own DIY exposure unit using your LED strip lights to cure the emulsion on my screens for printing onto clothing material. 395 nm seems to be the most recommended for this application, but I'm wondering if your 365 nm version would be a better alternative?

At this time, we, unfortunately, do not have any definitive answers as to whether 365 nm or 395 nm is the more effective wavelength option for screen printing applications. Our customers have actually reported success with both wavelengths, but we aren't able to say with confidence whether one works better than the other.

Variations in emulsion materials between manufacturers and products can result in different sensitivities to different wavelengths. We do hope to conduct some tests internally for specific products in the near future, as we do indeed have numerous customers who are also interested in using our products for this application.

Our suggestion would be to perhaps consider the 395 nm first as it is at a lower price point. On the other hand, the 365 nm is generally a wavelength that is better suited for chemical curing processes, so that can also be a potential option for you to consider as well.

Finally, for assembly, this illustration below may be helpful in showing you how the sections can be joined together:

How do I determine the amount of lighting needed based on specific room dimensions?

How do I determine the amount of lighting needed based on specific room dimensions?

We have a tool on our website for estimating the proper amount of lamps and lumens for ideal lighting of spaces on our website, which I have linked below.

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