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Home /  Support Center /  Knowledge Base /  Color matching

Do you have color-critical LED bulbs?

Do you have this type of LED bulb available for downlight fixtures? D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000)

Based on the details provided, we would likely recommend our 5000K NorthLux™ 95 CRI BR30 LED Bulb for Artwork & Studio. This product utilizes the same 5000K LED technology as our D50 fixtures for color matching and is designed for recessed lighting. 

99 CRI LED Strip Light for Proofing Slides and Photographing Artwork

I would like to replace the fluorescent bulbs in my Justlicht light table with your CRI 99 LED. Yes, you have 4-foot bulbs that I could drop in, but they are CRI 95, and I would prefer 99, as well as being able to use the LED strips in another lightbox to photograph art objects. Doable?

I am a photographer, and color corrections are critical for my work, both for proofing slides and photographing artwork. Therefore, a flexible solution of CRI 99 LEDs would be best for me. Do you ship to Iceland?

We are happy to confirm that we are able to ship orders internationally to Iceland. These orders typically take one to two days to process before being dispatched. 

Further, we can also confirm that our D50 5000K T5 LED Linear Light Fixture for Color Matching (ISO3664:2000) (PN4026.2F.50.4P) is compatible with the input frequency of 120 – 277V AC at 50 – 60 Hz. As such, it appears that the product would be compatible with the 220V AC referenced. 

If the ABSOLUTE SERIES™ LED Flexible Strip is of interest, we can confirm that the product can be used with 12V DC Power or line voltage via the 12V TRIAC Dimmable Power Supply.

Color Accurate T8 LED Tube Light for Photography Lighting

I design and build photography stations for the pre-loved clothing industry, for these fully enclosed units I have been using Quasar T8 and T12 tubes, I have had several failures and I am looking to change my supplier, can you please advise if your tubes are color accurate such that all tubes will give an identical color rendition, even if different batches are used. Do you supply mountings of any kind or would I just use generic mounting clips? 

We are happy to confirm that our lighting products undergo strict testing to ensure that they can uniformly illuminate with very little tolerance for variability. 

If they prove to be helpful, we have provided a link to our set of product photometric reports below. Included in this link are the reports for our 5000K and 6500K T8 LED Tube Light products, which we often recommend for installations where accurate color calibration is important. 

5000K NorthLux™ 95 CRI T8 LED Tube for Art & Studio - Report

6500K NorthLux™ 95 CRI T8 LED Tube for Art & Studio - Report

Further, the T8 LED Tube Lights utilize the G13 Medium Bi-Pin fixture power connection. 

Lightbox for Color Matching

I would like to build a light box (daylight cabinet) for color matching using flexible strip 99. Do you have any available designs showing the box and relative positioning of the strips?

While we, unfortunately, do not have any design documents regarding the placement of LED Strip Lights within a lightbox, we would be more than happy to answer any installation or product questions that you might have. 

In the interim, we have provided a few LayoutMap links below, including two which illustrate installations that use several connected segments of our LED Strip Lights, which we hope proves to be helpful. 

LayoutMaps™ - LED Strip Light Layout 3001-1B

LayoutMaps™ - LED Strip Light Layout 3002_2B

LayoutMaps™ - LED Strip Light Layout 3001-1C

D50 T8 LED Tube Light Color Matching for Print Studio

I have a color print studio. The viewing wall is 16 feet wide and is lit now by 16 GE Chroma 50 T12 bulbs in four 4-foot fluorescent fixtures without diffusers (bare bulbs). They are rated at 2250 lumens. Total lumens 36000 and the light is very even. The D50 5000K T8 LED Tube Lights for Color Matching are rated on your website at 1800 lumens, which would be a total of 28800 lumens. My question is how would the lighting effect for judging the prints compare? Is 2250 vs 1800 lumens a true measure of the light output? 

We can confirm that the lumens listed on the product pages are a measurement of the total light being output in all directions by the light source. 

​While the quality and accuracy of the light output are measured in CRI and other metrics, you may find that the lower overall lumens may result in the reduced total illumination of your installation area.

As an alternative, we might recommend increasing the quantity of T8 LED Tube Lights by using additional fixtures in order to meet your illumination target. 

Further, it might be helpful to know that our T8 LED Tube Light products are not compatible with the ballasts within T12 fixtures. 

In the event that you install our products within the T12 fixtures, we recommend bypassing the ballast to utilize a direct wire configuration as illustrated within our product user guide. Please note that use with incompatible ballasts will cause damage to the hardware, and will void the warranty. 

High CRI Color Matching T8 Fixture for Dental Treatment

I need energy efficiency (over the life of the "bulb") to use in dental treatment where color matching is critical to customer service. Currently, using a color-corrected F8 fluorescent I see that the life of light varies as well as the warranty. Does wiring using the existing ballast versus 120V affect the CRI or life of the bulb or cost?

Based on the details provided, we would likely recommend our D50 5000K T8 LED Tube Lights for Color Matching. These lights are calibrated to the D50 standard for color-critical installations and offer a high CRI of 95+. 

It might be helpful to know that many fixtures utilize ballasts that are not compatible with LED power requirements, although they can be bypassed for full functionality. When used with incompatible ballasts, performance issues will likely be encountered that will dramatically shorten the product lifetime and will void the warranty. 

That being said, we can confirm that using direct wiring, if necessary, would not affect the cost or lifetime of the product compared to use with compatible ballasts. 

What is the difference between the NorthLux and the Centric Daylight? The Centric is rated for 50,000 hours and the NorthLux is 10,000. Is that correct? Both have the CRI of > 95 in the description line. I did not go through the spectrum analysis but I assume there is a difference there, but one lasting 5 times longer. Should I consider the Northlux in the area where color matching is done and the adjacent hallway the centric daylight both at 5K?  

The D50 5000K T8 LED Tube Lights for Color Matching have strict color maintenance requirements as defined by ISO 3664. As such, the 10,000 hours define the lifetime where the output aligns with ISO D50 compliance for color matching installations, whereas the 50,000 hours lifetime is in regards to general lighting.

Color Corrective LED Lamps for Graphic Application

I have a graphic that is using F32TSXLSPX50 HL lamps and would like to go LED. I would like an A/B direct wire lamp if it's available. 

Based on my review, the closest match to the F32TSXLSPX50 lights within our catalog would be the 5000K CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free T8 LED Tube Lights, though the GE product provides 3000 lumens versus our T8 products which offer 1600 lumens. 

Before submitting your order, we strongly recommend ensuring that the ballasts within your pre-existing T8 fixtures are compatible with our lights. To this end, we suggest purchasing a 4-Pack of the product in the desired color temperature to ensure functionality before submitting the larger order. 

When these lights are used with incompatible ballasts, the product warranty will be void and functionality issues are likely to be encountered. If the ballasts are not compatible, we would recommend bypassing the ballast for the unencumbered functionality of the lights.

High CRI Color Matching LED Lights

I'm an artist in the UK and I frequently need to mix pigments to match a very specific color of an object. I can't afford a Pantone light booth, so I'm looking for a high CRI/spectrum bulb that can be used in an ordinary lamp holder/fixture. 

Based on the details provided, we would recommend either our 5000K or 6500K E26 CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free A19 10W LED Bulbs, which can provide full-spectrum output and a high CRI of 95+. 

99 CRI Color-accurate LED Lights for Paper color

I'm having difficulty finding lights that show the difference in paper color in my print shop. Under natural daylight the difference is obvious. Under traditional fluorescent tubes it's hit or miss and depends on a variety of factors. LED lights, however, are the absolute worst. Even my 97+ CRI photography LED lights don't show the difference. I picked up some of your 95 CRI PN4005C.50 bulbs hoping they would do the trick, but they do not. Is your 99 CRI light strips any better at this?

It does sound as though your installation would benefit from the 99 CRI Absolute Series LED Flex Strips. 

These products can output light that is virtually indistinguishable from daylight, which we hope is helpful for the color-accurate requirements of your print shop. 

If you would like to try the product, please feel free to take advantage of our 30-day return policy. So long as the LED Strip Light is not cut or altered, including the adhesive being removed, we would be happy to accept it as a return. 

Linear Light Fixture for Colored Pencil Drawing

I am interested in a linear light fixture underneath a shelf for colored pencil drawing. There are 3 products and I am not sure which one is best for my need. Could you suggest one? Also, may the linear light be plugged into an extension cord? 

Our T5 linear light fixtures sound like a great fit for your application. Generally, our 5000K is the most popular option for artwork and other visual applications where color accuracy is paramount.

Here's a direct link to the 5000K version which we would recommend:

The product can certainly be used with an extension cord, and this is definitely something many of our customers do since the included cord is quite short.

High CRI Flicker-free LED Bulbs for Color Matching and Painting

I’m looking for high CRI bulbs for my art studio, and I’m wondering which of your bulbs would be the highest in CRI value for color matching and painting? Also, you have flicker-free bulbs. Is that referring to the actual bulbs flickering or the frequency they work on that stop flickering when filming in slower frames per second?

For art studios, we usually recommend the NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio, which is available in the most common color temperature for artwork (5000K and 6500K). As our line of A19 and A21 bulbs utilize the same internal technology, they will all feature the same high CRI of 95+. 

Though not a lightbulb, you may also be interested in our ABSOLUTE SERIES™ LED Flexible Strip. This product features a CRI of 99, making the output virtually indistinguishable from natural daylight. 

Generally speaking, the flicker rate of the LED lightbulbs is calculated by measuring the relative difference in brightness between the maximum and minimum brightness exhibited during a flicker cycle. 

Our flicker-free lightbulbs output light that is constant and uninterrupted, meaning that the fluctuations of brightness are extremely minute (less than 1%). For installations where they are used to illuminate video capture, the lights fluctuate fast enough that there would not be any visible flicker. 

LED Lights for Small Home Studio

I'm a serious amateur photographer with an interest in photographing art (primarily oil paintings) in art galleries in the US and Europe. It is important to me that my images, which are both printed and used in PowerPoint slide presentations, show the true colors as painted by the artist. I have the requisite tools to calibrate my screens and art-quality printer. However, I am concerned about the lighting in my small home studio. My studio is a second bedroom with a white ceiling and light beige walls. There is a south-facing window with a translucent shade that remains down. All lighting comes from lamps placed strategically so as not to have direct light on my monitors. Each has a tapered (empire-style) white shade that illuminates the ceiling. 

The light at the workstation appears quite uniform, but I do not have the capability to measure this. The light bulbs are standard hardware store LED lamps. 5000K, 2200 to 2400 lumens I have been reading your literature, and it would appear that I am using inappropriate bulbs for my application. I would greatly appreciate your recommendations for A19 bulbs that would be better suited to my needs.

Based on the details provided, we would likely recommend our 5000K NorthLux 95 CRI E26 A19 LED Bulb for Art & Studio. These products are available in the most common color temperatures for photography and artwork creation (5000K and 6500K) and offer flicker-free output with a high CRI of 95+.

That being said, it does appear that they are only able to offer 800 lumens compared to the 2200 to 2400 lumens of the existing lightbulbs. As such, in the event that they fit your fixtures, we might recommend the 5000K CENTRIC DAYLIGHT Full Spectrum Flicker-Free A21 15W LED Bulb.

​The A21 bulb has slightly larger dimensions than the aforementioned A19 bulbs, though it is also able to provide the same high CRI of 95+ along with doubled output at 1600 lumens.

In the event that you would like to directly compare these options in your home studio, please feel free to take advantage of our 30-day return policy if any of the items wind up being unneeded. We will gladly provide prepaid return labels upon request.

5000K vs 6500K: Recommended Color Temperature for Photo Booth

We currently have a car dealership and a photo booth where we take pictures of cars. I am looking at your NorthLux™ 95 CRI LED Shop Light Fixture and wondering what the recommended color would be for a photo booth. 5000 or 6500? We are simply looking for the best lighting to take pictures of our vehicles. 

For photography installations where color-calibrated lighting is important, we usually recommend the 6500K option. 

If you find the 5000K NorthLux™ 95 CRI T5 LED Linear Light Fixture to be a better fit, please feel free to take advantage of our 30-day return policy, where we will gladly provide you with a prepaid return label for any unneeded items. 

Does your color rendering LED lighting compatible with global voltage standards?

I am interested in the LED product for color rendering. However, I live in Australia with 240 AC /50hz power across Australia. Will these light work in Australia I am very interested in this product for my new studio.

We are happy to confirm that many of our products, such as the D50 5000K A19 LED Bulb for Color Matching and D50 5000K T5 LED Linear Light Fixture for Color Matching are compatible with global voltage standards, though the latter T5 option may require a socket adapter. 

D50 vs D65 for Color Matching Stained Glass

I am building a light box to use with color matching stained glass. Need to match sunlight. I'm considering items 4026.2F.50 or 4026.2F.65. Which would you recommend for my application?

For matching daylight, we would recommend our D65 color temperature option of the NorthLux™ 95 CRI T5 LED Linear Light Fixture. (PN4026.2F.65)

The light box where the light(s) will be installed will have a glass or plexiglass (I haven’t decided which is best to use) cover of approximately 24”L x 19”W. Would one bulb be enough or two, three?

Based on our limited experience with lightboxes, we have found that the ideal lumen output is often defined by the purpose. 

For example, a light table used for the photography of negatives might require a very high output to assist with high-quality capture, whereas you may not require as much output for your stained glass work. 

If you have a precise lumen target for your lightbox, it might be helpful to know that the 2 ft T5 Linear Light fixtures have a lumen output of 900. 

High CRI light for Color Transparency and Re-photographing

I am looking for a high CRI light source for color transparency and re-photographing for museums. I need an even light source of about 6x6 inches.

The light table is about 5” in depth, but we can use any table. The largest films we re-photograph are 4x5", so if the diffused light is about 6” inches then would be fine. I don’t mind making a box to hold a bright 5000K LED array and I’ll add white plastic to even the light out - several layers. So far I have done about 10,000 images and they look a lot better than flatbed or even drum scanners, which I once owned. The modern sensors in cameras are simply better. And I can balance the camera to the light to get the RGB equal.

What about strip lights, cut up? Seems hard to connect and needs DC power, but you might have a better idea. Like something off the shelf.

The first product that came to mind was our D50 5000K T5 LED Linear Light Fixture for Color Matching. This product only requires a DC plug for power, can be daisy-chained, and offers 95 CRI light output. 

For a slightly more complicated installation, we would suggest our Absolute Series 99 CRI 5000K LED Strip Lights. These 99 CRI lights utilize pre-attached barrel-jack adapters which can easily connect to a DC power supply. 

Additionally, the LED Strip to Strip connectors can be used to connect segments of LED strip lights in the event that several parallel lengths were to be utilized.

6500K LED Lighting for Dental Office Remodel

I'm interested in color correct 6500 Kelvin LED lighting for a dropdown ceiling in a 3000 sq ft dental office remodel.

In the interim, you may be interested in our CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free T8 LED Tube Light, which is available in the 6500K color temperature and provides full-spectrum high CRI light output. 

You might also find value in our Lumen Estimation Calculator, which can provide recommend quantities of light products based on the dimensions of the office. 

Lighting Solution for Color Matching and Custom Picture Framing Presentations

I am seeking a solution for our color matching along with our custom picture framing presentation areas. I am looking for a lighting solution for two areas of concern. Number 1 is a color-matching room as I would call it. The size is 10 ft x 10 ft which currently has a 2 ft x 4 ft fluorescent lighting that would serve as a neutral light area. I would be color-proofing original Artwork to my calibrated monitor and my printed images. The second is two sales presentation tables for picture framing designs that I would like to place a fixture over so that we have a neutral color cast over this area. The tables are approx. 4ft x 8ft sections.

By entering the dimensions of the color matching room into our Lumen Estimation Calculator, we estimate that the area would be fully illuminated for artwork and capture by ~7,963 lumens. We entered 8 ft as the ceiling height in my process, though you will likely find value in adjusting this to receive a more accurate estimate. 

For this space, we would recommend 5-6 units of the D50 5000K T8 LED Tube Lights for Color Matching (ISO3664:2000) product. These T8 tube lights offer 1800 lumens per tube light, as well as a CRI of 95+. If the fluorescent fixtures being utilized contain ballasts, we would recommend checking our compatibility list to ensure compatibility. 

For the presentation tables, you may be interested in the 5000K or 6500K NorthLux™ 95 CRI LED Shop Light Fixture product, which offers 4500 lumens per unit and is easy to install utilizing the included chain and hook. 

As an alternative, you may also be interested in the ABSOLUTE SERIES™ LED Flexible Strip product, which has a CRI of 99, making them virtually indistinguishable from daylight. This item is available in both the D50 and D65 ISO standards and can be installed within ceiling-mounted channels, and paired with a wall dimmer via the in-wall TRIAC dimmable power supply. 

I have yet to progress further on this project and I am looking to expand my needs for this project. We have needed to reorganize the lighting area to a larger footprint 30’ x 26’ x 9’. I have attached a photo of the area and specifically the trusses that I hope to use to attach the lighting to. The trusses run the length of 30’ and there are 4 runs in total at 6’ apart. 

Since my main focus will be to properly evaluate a scanned piece of Artwork to what is printed the less color shift lighting brings the better. I look to your recommendation to best achieve this goal. Can you recommend a lighting package for this area?

For installations that require precise color accuracy, we usually recommend our D50 and D65 ABSOLUTE SERIES™ LED Flexible Strips. These products can offer a 99 CRI, and provide light output that is virtually indistinguishable from daylight. 

​As you will note from the review section of the above product page, several of our customers have found success in using this product for art production and photo capture. We certainly hope that this product is helpful for your installation as well! 

In the hopes that they prove to be helpful, we have attached the photometric reports for each version below:

D50 ABSOLUTE SERIES™ LED Flexible Strip 

D65 ABSOLUTE SERIES™ LED Flexible Strip 

Would you have some install photos to see how these would be installed? Would these just get attached to the trusses and left exposed or I have seen on your website there is a trim package but would the covers affect the light in any way?

Unfortunately, we do not have any installation photos readily available that we could share. We apologize!

We usually recommend installing the LED Strip Lights into channels, such as our flat Aluminum Channel for LED Flex Strips. 

​When installed within the channels, the light products can be easily adjusted or replaced if outages occur with more ease than if they were attached directly to trusses. These channels will also help to protect the LED light products from dust and residue that might cause operational issues in the future. 

The light covers will reduce the overall transmission by roughly ~10% as most polycarbonate diffusion panels will, though the color temperature and spectrum of output would not be expected to change. 

High CRI 6500K bulbs for Digital Photographic and Color Matching Applications

I need a few Hi CRI, 6500K bulbs for 2 separate uses:

1) Digital photographic slide capture and then editing on a 6500K color-corrected monitor. I have one of your 6-inch, white sample LED strips to try for lighting behind the monitor. I need Edison bulbs for indirect room lighting. I've looked at your website and found a few 6500K CRI >90 bulbs that might work, including some with high R-9 ratings. Do these bulbs need to be D-65 rated? What is your recommendation for this use?

2) Color-matching fabrics and buttons, etc. Can I use the same type of bulb or is a D-50 bulb more appropriate? Suggestions?

I noticed several dimmable Hi CRI bulbs listed, but I could not find their R-9 rating. Can use 1 & 2 be accomplished with a dimmable bulb, or does that add too much variability to the lighting?

As we currently do not offer 6500K filament bulbs at this time, we might alternatively recommend the Sidewinder™ LED Flex Strip for D65 Bias Lighting product, which is D65 calibrated and designed for bias lighting for monitors intended for color-correction.

Regarding the benefits of D65 vs D50 for your fabric sample color matching purposes, I have provided two links below from our blog, which each include sections comparing the benefits of the two for working with color. 

​Regarding the R-9 value, the specification sheets and photometric reports linked within each product page will be able to provide the R-9 output details.

What is D50?:

What is D65?:

I'm confused by the photometric test reports, or perhaps I don't understand your part numbering system. This makes it look like the D-50 calibrated bulb is the same as the Centric 5000K bulb(based on the report PDF) and the same as the NorthLux 5000K bulb based on the web page part number listing.

We can confirm that the D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) product and the 5000K NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio are identical products which are provided unique landing pages for marketing purposes. This can be noted by the shared part number of 4005.D50.

As such, you can expect that the performance will be identical across both items. We would like to sincerely apologize for any confusion that this might have caused.

Color Accuracy Bulb for Building a Lightbox or Photo Booth

I was interested in a few of the products you guys sell and was wondering do you guys have a flicker-free high CRI bulb with a color temp of 6500k. I went through the bulbs and am still confused about all these options. I was looking at 4005.D65 4005.65, and some of the other NorthLux and centric series and wasn't sure what would be best for color accuracy, I am building a lightbox/ photo booth for checking the color accuracy of plastic samples.

Based on the details provided, I would recommend the 6500K (D65) NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio products, which I can confirm as being flicker-free. 

​This product is also designed to conform to the ISO D65 standard, which is beneficial for installations that require an extremely low variability in light output.

If you would like to purchase a few of the options previously mentioned to make direct product comparisons in your space, please feel free to take advantage of our 30-day return policy. Simply reach out to let us know which items you would like to return, and we will quickly issue a prepaid return label.

Is the NorthLux™ 95 CRI BR30 LED Bulb also flicker-free? And are the specification and other product documents available to look at?

The NorthLux™ 95 CRI BR30 LED Bulb for Artwork & Studio, as well as our other BR30 bulbs, share a 6% flicker rate. Though not totally flicker-free as our A19 bulbs family of products are, it does offer a fairly low flicker rate.

In the interim, I have provided a link to the product specification sheet below, which I hope proves to be useful:

BR30 Specification Sheet:

Is there any difference between the A19 FilmGrade and NorthLux besides color temperature?

Is there any difference between the A19 FilmGrade and Northlux besides color temp? I need to color-match prints and originals to my calibrated monitor. I have the FilmGrade now and they seem a bit cool.

The NorthLux products are slightly different than the FilmGrade™ Flicker-Free A19 LED Bulb, in that they have been calibrated to conform to the ISO D50 and D65 color standards. These color standards can be quite useful for creating lighting installations that require a very constrained level of variability in the light output.

Beyond this difference, the performance should be identical as these items are both of the same product family. 

What is the difference between NorthLux™ 95 CRI LED Shop Light Fixture and the D50 5000K LED Shop Light Fixture for Color Matching?

What is the difference between NorthLux™ 95 CRI LED Shop Light Fixture and the D50 5000K LED Shop Light Fixture for Color Matching (ISO3664:2000)? I'll be doing mainly ceramics, with some printmaking in my studio. 

We can confirm that the NorthLux™ 95 CRI LED Shop Light Fixture and the D50 5000K LED Shop Light Fixture for Color Matching (ISO3664:2000) are identical products that are provided unique landing pages for marketing purposes.

As such, you can expect that the performance and color accuracy will be identical across both items. We would like to sincerely apologize for any confusion that this might have caused in your planning purposes.

Difference between NorthLux 5000K & D50 A19 Bulbs

I can see using the D50 color-matching bulbs near the computer to check digital images of my paintings. But what's the difference between these A19 bulbs and the Northlux A19 bulbs at 5000K?

We can confirm that the NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio product and the D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) are identical products that are provided unique landing pages for marketing purposes. The key feature that these items share is the D50 calibration, which can be very beneficial for color-sensitive work such as print design. This can be noted by the shared part number of 4005.D50.

Similarly, the Ultra High 95 CRI 6500K E26 A19 LED Bulb for Jewelry & Display product is from the same family line and offers an identical CRI of 95+ as our other A19 products.

As such, you can expect that the performance will be identical across these items, though each is calibrated slightly differently. However, we would like to sincerely apologize for any confusion that this might have caused.

Daylight Bulb to View Prints for Color Accuracy

I am looking for a daylight bulb to screw into a regular tabletop lamp to view prints for color accuracy. I'd like to get the brightest bulb available to make sure IU has full lighting coverage. Which do you recommend?

Based on the details provided, we might recommend our D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) product. This item is designed to be calibrated to the D50 standard, which could be quite valuable for print viewing and color accuracy.

LED Lights that Simulates Sunlight and UV Output

I'm an avid salmon fisherman. I tie a lot of flies and painting lures for salmon. I'm looking for a light that best simulates sunlight but also has UV down to about 350nm. Do you have a light that would work? 

While we can confirm that many of our products (such as the ABSOLUTE SERIES™ LED Flexible Strip) offer light output which closely simulates direct sunlight, these products generally do not offer UV output as well. 

As such, we, unfortunately, might not have the ideal lighting product available at the moment.

I was looking for a simple bulb. I have a light box I built where I can put different colored filters to simulate different watercolors. However, currently, it just uses a standard bulb. About UV, is there a single 350-400 nm light you guys sell?

If your light box is designed to utilize an E26 base lightbulb, we unfortunately might not have the ideal ultraviolet product form factor available at the moment. However, depending on the dimensions and design of the lightbox, you might also be able to utilize our 365 nm realUV™ LED Strip Lights. This product is designed to output UV-A light which is centered within the referenced range.

Film Grade LED Panels for Photographic Printing

Film Grade LED Panels for Photographic Printing

I am a professional photographic printmaker and require High CRI High R9 value print view lighting to just prints. I print using 5000K print view lighting but many times also view the print with 3200K lighting which is closer to the gallery and museum lighting. It looks like your Film Grade 9.5" x 18.9" flexible LED dimmable panel would work well for my needs. My print viewing area is 36" high by 60" wide. I want to determine if I need 1 Film Grade Flexible panel or 2 Film Grade Flexible panels to cover my print viewing area with even illumination. I will also want to be able to select 5000K precisely using the dimmer device. 

Our FilmGrade LED panels would certainly meet your color point needs, but unfortunately, we currently do not have any dimming solutions that would meet your requirements. (We currently support DMX only, for use in TV studio / theatrical installations).

​We do apologize for the inconvenience!

​As an alternative, we would perhaps build a panel using our single-color LED strip lights which can be used with our in-line dimmer. For example, please see below for an example layout:

Color Critical Lighting for Cultural Heritage Field

I would like to know if you have a product using the Toshiba TRI-R LEDs. We are involved in the Cultural Heritage field and need a better solution for lighting than currently available products. I am looking for a lighting solution similar to your flexible panels with the lighting spectral quality of the TRI-R-led specifications for proof of product assembly. 

We are not affiliated with Toshiba but we do have a line of 99 CRI products that may closely approximate the color rendition performance you are looking for.

​Below is our product page showcasing our ABSOLUTE SERIES 99 CRI products - please let us know if this is something that may work for your needs, and we would be more than happy to assist with any additional questions or concerns!

From your link, I think we would need the equivalent of 52 strips to make 2 panels approximately 22”x 11” with full coverage over the area. Is there a connector solution that would work for that? Or do you have an option for the absolute series in an already-made panel about that size?

I would also need a power supply/driver to power 2 panels about that size. As well as a dimming module to work with to set output.

​Unfortunately, we do not have any panel-type products, although I completely agree that this would be an ideal use case for such a product.

​As such, the best alternative would be to use an array of LED strip lights as you suggest. In back-calculating from the suggested quantity, it appears that you would be looking at 26 rows of 22-inch length LED strip sections per panel.

This works out to approximately 48 feet or three reels of 16.4 feet each.

The general limitation for LED strip wiring is 16.4 feet (one reel) per power supply and dimmer connection. This is due to the current carrying capacity limitations in the LED strip as well as those of the power supply.

​As such, your single panel will require three separate sets of power supplies and dimmers, which may or may not be an issue for you from a feasibility perspective.

Each LED strip reel can be cut into as many shorter sections as needed; so each 16.4 ft reel, for example, can be cut into 9 separate sections of 22 inches each, and then re-joined using our solderless connector accessory PN 3071.

(For a visual overview of the components, here is an example layout for a similar configuration using our 24 volt / 95 CRI product which operates nearly identically from an electrical perspective:

T8 LED Tubes Lighting for Dental Office Operatories

I am interested in new lighting for my dental office operatories. My lighting needs have a very high level of color matching. Existing fixtures are approximately 20+-year-old fluorescent recessed troffers. I use T12 CRI 90 5000k bulb. Each fixture uses four 48" bulbs. I would like to improve my color-match lighting. What do you recommend? Do you have LED bulbs that will work in my existing fixtures? Do you recommend LED over fluorescent bulbs? 

Based on the details provided, we might recommend our D50 5000K T8 LED Tube Lights for Color Matching (ISO3664:2000) product, as it is designed to be compatible with the D50 global standard for color-critical applications.

Regarding fixtures, we can confirm that these items are not compatible with all ballasts which are pre-installed within fluorescent T8 fixtures. However, we have compiled a list of tested ballasts, and include instructions on how to install these tube lights via ballast bypass methods on the product sheet.

As most fluorescent tube lights have a CRI of 80, the light output will likely wash out some colors. However, as our LED tube lights have a CRI of 95+, your office will benefit from much improved light output.

Full Spectrum LED Lights for Imaging Applications

I am currently looking into purchasing a full-spectrum light source to use in imaging and was wondering if you had any recommendations. Also, would it be possible to adjust the intensity? 

One of the most popular product options we've seen has been our T5 linear lamps, which can be installed quite easily in a variety of locations. These lamps feature 95 CRI which provides full spectrum and excellent color accuracy, features which are essential for accurate imaging applications.

Our D50 product in particular meets the ISO 3664 standards for color accuracy and should be a great option for your needs. Please see below for the product link:

The only downside is that these T5 lamps cannot be dimmed, so you will need to be able to work with a fixed brightness level.

Proper LED Products for Art Studio Lighting

I am an artist and have been on a long quest for proper lighting for my easel that will not distort colors. I have an east-facing window. I have read through much of your fantastic website, which is well done and very informative. I have a few questions:

Noting that I have an east-facing (not north) light source and think I would like the dimmable NorthLux™ 95 CRI BR30 LED Bulb for Artwork & Studio Edison bulbs would you recommend the 5000k or the 6500K?

​Both color temperatures should work well for your needs; however, 6500K is generally a better fit for north-facing windows. As such, you may prefer the 5000K for your east-facing window setup. 

​Please see below for additional insights from our blog:

​What would 800 lumens equate to in incandescent wats? I couldn’t find a scale to show me how lumen output compares to incandescent wats, which is what I am used to when comparing light brightness. If I get two of these which are 800 lumen or 60W halogen will these give me essentially 1600 lumens on my painting surface (depending on the distance of course)?

​800 lumens is approximately equal to a 60-watt incandescent bulb. You are exactly right that two bulbs would add up directly to 1600 lumens and provide twice the brightness.

​Do keep in mind, though, that incandescent lamps emit a much warmer 2700K color tone, so it can be a bit difficult to compare brightness when discussing daylight-calibrated bulbs. Nonetheless, it is certainly a good ballpark estimate when it comes to relative brightness levels!

​There are so many different light sources to consider when creating a painting: reference source (photo, print, iPad, computer, life), natural outside light (weather dependent), studio light (intensity, color, placement including projection on both paintings and palette), photographing final work for publication and giclee printing, and gallery or home viewing of the finished painting. I read on your site that a device’s screen can emit blue light. So, is it probable that this is the first point where color can become distorted?

​That is exactly right - most digital displays will be calibrated to D65 (6500K) but of course, depending on the level of sophistication and quality, the calibration may or may not be accurate. Even natural daylight, as you mention, can change depending on the weather and season, so that can be difficult to navigate as well.

​That is where high-quality studio lighting comes in and can provide some consistency and accuracy. I have seen some customers even block out their windows and replace them with our lamps because the natural lighting was too inconsistent due to changing weather and time of day. Ironically, the only way to ensure consistent lighting would be to only use a high-quality, full-spectrum artificial light source, day and night.​

​If an artist is working primarily from an iPad should they choose the 6500K light because it matches the blue light from the iPad or goes with the 5000K because it will color compensate?

​Unfortunately, it does not seem that Apple likes to publish technical data about their iPad product and I was unable to confirm if their screens are calibrated to D65 (6500K). That being said, I believe almost all digital displays are calibrated to D65, so there is a strong likelihood that the iPad product line is also D65 calibrated.

​If so, the 6500K light source will be a better match to the iPad, since as you mentioned correctly, the 5000K will be a bit "warmer."

​(Here is some additional information on D65:

​So many questions, but your team seems to have the technical expertise to answer them and for the various combinations of light. If these bulbs and your recommendations turn out to be the Holy Grail of Art Studio lighting, I would like to share it or see it as a feature article or workshop with my local, national, and international art society membership because many artists seem to struggle with this lighting issue because it is such a science complicated by the ever-changing variety of bulbs and diverse lighting comparison scales. Also, would you have any discounts available for our membership? 

We would be honored to have you share your experience working with our products! As a general policy, we do not offer any group or membership discounts, but I would be more than happy to share the opportunity with our team at that time.

Shop Lighting for Auto Detailing

Would like to talk with someone regarding lighting for a shop for paint correction and also for home lighting fixtures we have.

Our 95 CRI LED products sound like a great fit for auto detailing.

​Our most popular product for such locations is our NorthLux shop light product, which I have linked to below:

Depending on whether or not you have existing T8 fixtures, our NorthLux T8 lamps may also be a good fit:

LED Bulbs Products for Color Control in Photography

I photograph (multi-shot/PS stitched) original art and maps for large-format reproduction. Have you gotten any feedback on the best product, bulb, or strip for better color control? I have fabricated light fixtures in the past and would appreciate advice on recommended reflector specs.

Based on the details provided, there are a few products that we might recommend.

For example, in the event that you were to utilize traditional E26 lamp fixtures, we might recommend the D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) product.

However, if you were hoping to utilize traditional tube light fixtures, we might recommend the D50 5000K T8 LED Tube Lights for Color Matching (ISO3664:2000) product.

For more information regarding the D50 standard, this article from our website might prove to be useful:

A19 LED Bulbs for Photographing Paintings

I'm looking for the best A19 bulb for photographing paintings. Kelvin, wattage recommendations? 

Based on the details provided, we might recommend the D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) product. This product is designed to be compliant with the D50 standard, and could be a great option for your space.

Oil Painting Studio Lighting Recommendations

I am a professional Oil Painter, and I am looking for your recommendations on bulbs for my 4 softbox lighting kits (16-20 bulbs total). I have to paint at night while my kids are sleeping so it is essential that I have as close to perfect daylight as humanly possible, so if you would kindly suggest your best options I will order all of them.

​Our NorthLux A19 is one of the most popular products among our artists and studio customers who are after the best color rendition for daylight-calibrated color temperatures. I've included the link below:

You mention that you're after a lamp that is as "close to perfect daylight as humanly possible," and we're very confident that the 5000K and/or 6500K color options will meet your needs here. The one tricky thing, as I'm sure you are aware, is that "perfect daylight" can be challenging to define, as natural daylight conditions can change depending on the time of day, season, geography, and weather - not to mention the orientation of the windows and other natural lighting features in a studio space.

As such, we offer both 5000K and 6500K color options to allow our customers to decide. The 5000K color option more closely resembles a neutral, noon daytime light color, whereas the 6500K color matches the natural light that you would see from a north-facing window on a clear day. Both feature 95 CRI, which indicates that they will be a near-perfect match to natural daylight, but as I've described above, the definition of "natural daylight" is a bit different when choosing 5000K vs 6500K.

We do have a blog article going over the differences below, which might be helpful:

Our A19 lamps include a standard medium screw base and should be a quick and easy installation in your existing soft light boxes. Each lamp is approximately equal in brightness to a 60-watt incandescent bulb (but, of course, with daylight color calibration!)

Flicker-free Bulb for Color Rendition and Artwork

I'm looking for a flicker-free bulb that has good color rendition, for alertness and artwork. What do you recommend?

Though we, unfortunately, do not have 100W bulb products available at this time, we're happy to confirm that we sell many products that offer a high CRI which could be beneficial for artwork creation.

For example, our D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) product is flicker-free and offers a high CRI of 95+, as well as an R9 value of 80+.

This product is also designed to be compliant with the D50 CIE Standard, which may prove to be useful. For more information on D50, we have a terrific blog post on our website, which I have linked below.

What is D50 for graphic arts & printing?:

Are there any flicker-free floodlights?

Unfortunately, we do not currently sell any flicker-free floodlights aside from our realUV™ LED Flood Light product at this time.

However, based on the details provided, our NorthLux™ 95 CRI T5 LED Linear Light Fixtures might be of interest as an alternative. These integrated lighting fixtures can be easily mounted onto many surfaces, contains all electrical components within the housing, and are available in both the 5000K and 6500K color temperatures.

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.

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:

High CRI and R9 Lighting for Textiles and Leather

I make handbags that incorporate textiles and leather. I need to get accurate color when photographing my pictures. I am taking pictures myself and am not a professional photographer. Is there any LED lighting that you can recommend? I’m taking pictures indoor. I also have an adapter that can fit LEDs into a soft box. I’ve tried natural light but I’m trying to get consistent pictures for my online website. 

Based on the details provided, there are a few products that we might recommend depending on your ideal installation method.

The primary product that we might recommend is the 99 CRI ABSOLUTE SERIES™ LED Flexible Strip product. This product feature light which is virtually indistinguishable from natural daylight, which could prove to be useful with your photography.

Alternatively, in the event that you would prefer to use traditional light fixtures, we might recommend our NorthLux™ 95 CRI BR30 LED Bulb for Artwork & Studio products. However, please note that this product is currently backordered.

As a final recommendation, our NorthLux™ 95 CRI T5 LED Linear Light Fixtures can be easily mounted in multiple configurations, and contain integrated lighting within the product housing, which reduces the amount of required accessories.​

D50 or Northlux: T5 LED Linear Light Fixture for PC Monitor Lighting

I would like to purchase a 4ft T5 LED Linear Light Fixture to light a pc monitor. Do you recommend the D50 or the Northlux? How long is the power cord? 

We can confirm that 5000K NorthLux™ 95 CRI T5 LED Linear Light Fixture item is the same product as the D50 5000K T5 LED Linear Light Fixture for Color Matching (ISO3664:2000) item. This can be noted by the shared part number of both products, PN 4026.2F. 

We do apologize for any confusion this may have caused, as these products are listed on multiple pages for marketing purposes.

As such, you can expect identical high performance from both items in your installation, including D50 compliance. Both of these products also contain a power cord which is 12 inches in length (30 cm).

LED Linear Module for Color Rendering Installation

I'm looking for a high CRI (Re) color rendering light (I make copies of paintings). I need to put a certain amount of light above me with a tilted head on a light stand-by. Do you have some suggestions? (product code 7001.50.5P) 

Based on the details provided, it does seem that the LED Linear Module product could be a great solution for your color rendering installation.

We're happy to confirm that the module is designed to be compatible with mounted installations using M3 screws, and can further confirm that we have heard of customers in the past who have installed these products into lighting fixtures.

Choosing LED Northlux vs Centric Daylight for Painting Studio

I have a question about choosing Northlux 95 CRI bulbs vs the Centric daylight full spectrum bulbs either in 5000K. 

I am using these lights in a painting studio so I'm looking for high as possible color quality as can be. I also read your site said if I care more about a CRI I should use a fluorescent fixture choosing one of those bulbs above which fixture below would suggest for my situation and how many fixtures of each would you suggest to obtain the ideal illuminated result in the painting studio? Further information to give more background in my situation. I have a 12" x 16" space with 15-foot ceilings and I will be making work on both 12-foot walls as well as one 16-foot wall. 

The primary difference between the 5000K A19 bulbs can be found in the CIE D50 standard which the NorthLux product was designed to be compliant with. This is an international color standard which many find value in, due to the low amount of variability in light spectrum output across compliant products.

Here is a great blog post from our website which explains this standard further, which might be helpful:

However, in the event that you would prefer to utilize a T8 LED tube light fixture, I am happy to confirm that both fixtures provided appear to be compatible with our products.

The two LED tube light products that I recommend for your studio are the D50 5000K T8 LED Tube Lights for Color Matching (ISO3664:2000), and the NorthLux™ 95 CRI T8 LED Tube for Art & Studio. The D50 5000K option has a higher R9 rating than the NorthLux (95 vs 91), which could be beneficial for working with color.

Based on my calculations using our lumen estimation calculator, it appears that your space would benefit from 15,981 total lumens. As each of the T8 LED tube lights emits 1800 lumens, we recommend 9 lamps in order to sufficiently illuminate the space.

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.


Overhead LED Lights Fixtures for Dental Lab Lighting

I have a dental lab and want to use overhead lights to create natural light to match shades for teeth on my bench top. I have no fixture but I need to get one or more. It would flush mount or hang. Ceiling is 70 inches above bench top. 

Our 95 CRI / full spectrum light sources are likely to be a great fit for the application. 

Below are two fixture products that may fit your needs well. Please let us know your thoughts:

D50 T8 LED Tube Lights for Color-Matching

We are looking for D50 Daylights for our color-matching table for printing and Packaging film checking. With the currently installed daylights we are facing an issue with online approval of our printing substrate through video calls there is flickering in the video and the other person on the video call is not able to see the substrate. Same problem we are not facing with normal light. So we are looking for such day lights which work fine with video transfer.

Currently, we use fluorescent tubes with electronic ballast of 36 watts, lengths of 1200mm, and 5000K. 

Based on the 5000K and 1200 mm length specifications, I've determined that our T8 D50 lamps are the best option for your needs. Please see below for the product link:

​We will also need to check for electronic ballast compatibility. The ballast must be listed on our list of compatible ballasts (found here: for safe operation. If the ballast is not listed, you will need to perform some fixture modifications to remove or bypass the ballast altogether.

I want to confirm about the flicking issue we are facing with the existing light at the time of video calls will not be there with this T8 D50 lamps please advise. For electronic ballast, we can bypass if your LED lamp is not required the same.

Yes, these lamps are flicker-free when used without a fluorescent ballast (including an electronic ballast bypass). This would include video conferencing applications.

Please provide the datasheet for the light Certified that the provided light is D50 lights.

We have attached a link to the product photometric report below, which displays the full product light output technical details.

D50 T8 Spectrum Test Report:

Recommended LED Strip Lights with a brightness level equivalent to a Retail Showroom

I am interested in the LED strip lights to light an area 15m long by 6m wide and 2.8m ceilings to a brightness level equivalent to a retail showroom. The calculator says I will need approx 42,000 lumens however I want to confirm that the led strip lights will be suitable. The purpose of the room is mostly storage for area rugs; however, customers regularly request more photos, so colour-accurate lighting throughout the entire area would be ideal. If I was to run two lines of the led strip lights from one end to the other which would equal about 6 reels total, would this actually light the area to the required level? Other than the 6 reels what else would I need to install this? 

To confirm, I've also run the numbers on my end based on the dimensions provided (converted to approximately 50 x 20 ft = 1000 square feet).

​The 42,000 lumens would provide you with approximately 40 footcandles, which is a great brightness level for general color evaluation, especially for larger surface areas such as rugs

Each reel emits approximately 7500 lumens, so the 6 reels sounds like a great target (7500 lumens per reel x 6 reels = 45,000 lumens). Each 16.4 ft (5 meter) reel requires its own power supply, so you will also need to purchase 6 power supply units.

I've linked to some example layouts which show how the power supplies can be connected for a non-dimmable, and dimmable setup, respectively:

Going with the same target of approx 43,000 lumens and using the linear light fixtures I would need 24 fixtures however I am not sure of the difference between the Northlux 95 CRI and the D50 for color matching, is there a benefit of one over the other for my use case?

Both the NorthLux and D50 T5 linear lights are actually the same product listed on different product pages for marketing purposes (PN 4026.4F.50) - sorry for any confusion!

We will also be creating content for social media, photos and videos (will the lights flicker?).

Our next batch, expected to be available in Feb 2021, will be 100% flicker free and will be suitable for photography.

We would like to have the warehouse look like it is a bright naturally lit room, and are considering the 5000K colour temperature.

This sounds like a great choice! 5000K is generally a nice, neutral light color that approximates noon sunshine. (6500K would be closer to north-facing blue sky).

We will be running the fixtures down two rows the length of the warehouse approx 1.5m from the sidewalls, if we ran 12 along each side would this create the evenest lighting or is there a better method? 

The best way to achieve even lighting would be to space out the fixtures as evenly as possible. Of course, with wiring and aesthetics that may not always be realistic. If I recall correctly, you had mentioned that the width of the space is 6 meters, so running the fixtures 1.5 meters (or perhaps 2.0 meters) from the walls would indeed provide sufficiently distributed light.

How many lights can be daisy-chained together? how many fixtures can be grouped per power plug, and do you have international plugs available at all?

The maximum connection is 70 feet (21 meters). If using the 4-ft fixtures, this would work out to approximately 17 fixtures per daisy-chain link. Unfortunately, we do not provide any additional plug converters, but you may also want to consider locating a C8 plug wire locally, should you prefer avoiding the use of a plug adapter.

Absolute Series D65 LED Flexible Strip for Color Matching

Can your Absolute D65 modules be used for color matching? I see you offer D50 T8 lights for color matching, however, we require D65 for textiles. Do you have any plans to offer this light in D65? 

We're happy to confirm that our 6500K ABSOLUTE SERIES™ LED Flexible Strip product is D65 Illuminant-compliant, and can be used for color matching.

We can also confirm that the 6500K NorthLux™ 95 CRI T8 LED Tube for Art & Studio product is compliant with the D65 Illuminant standard as well.

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. 

D50 or 5000K LED Lights with Best CRI for Color Creating and Matching

I'm a colorist, creating foundation shades ( makeup) I was looking for the best light to work with, and I thought the D50 would be perfect I notice Centric Daylight has a better R9 ( 100%) compared to the D50 ( 92%). Also, the Centrix are Flicker free so it would be healthier right? I'm facing north and I have Large Windows Could you tell me which bulb should I get? It would be great on your website to have a Graphic comparing all the light and the data! PS: I wanted to tell you that all the blogs regarding, Kelvin, CRI, UV, and other Questions are so Interesting! 

Based on the details which you have provided, we might recommend the 5000K NorthLux™ 95 CRI E26 A19 LED Bulb for Art & Studio product, due to the higher R9 value (listed as 94 in our latest photometric report), which could be very valuable for the color work that you mentioned.

However, please know that we also offer a 30 day return policy. In the event that one product winds up being preferable over the other, we will gladly issue a return label for a refund.

CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free T8 LED Tube Light for Paint Shop Application

We are updating the lighting in our paint shop and your CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free T8 LED Tube Light seems like a perfect retrofit. The most important thing is that the paint colors appear inside as close to the way they appear outside. I wanted to check in and see if these are the bulbs that you would recommend, and if you would suggest 4000K, 5000k, or 6500k. Based on your write-ups the 6500k seems like the most appropriate - but I always like to check in with the pros! 

Based on the description provided, we might recommend the CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free T8 LED Tube Light in the 6500K color temperature option. The light which is emitted by the 6500K tube lights will be extremely similar to that of full daylight.

That being said, please note that we offer a 30 day return policy for all orders. In the event that you decide on a different color temperature after installation, please let us know and we will gladly issue a return label.

LED Home Office Lighting: Best Color Temperature that Mimic Sunlight

I am trying to mimic "sunlight" in my small home office now that the days are getting shorter. The closest thing to my desired lighting that I have experienced is dental overhead lights. I recently purchased a FilmGrade A19 LED bulb, but it felt a bit cool to me. I realize that natural daylight sits in the 5600K to 6500K color range. 

1) Do you have suggestions for which of your A19 or BR30 bulbs may best fit my use case? 

2) Am I always going to find "natural daylight" options a bit too cool? Would 4000K or 5000K offer a better experience? 

Getting the correct color temperature is indeed a challenge!

​You are correct that the 5000K to 6500K range is generally considered a good match for natural daylight. 4000K is also a nice option, and you may find some useful information on our blog post here.

​One thing to keep in mind that oftentimes, natural daylight color temperatures can appear a bit blue or stark when you do not have enough brightness overall. To that end, if you have any information on the total square footage being illuminated, we may be able to provide some additional recommendations on the quantity of lamps needed to provide sufficient brightness at that color temperature.

We would perhaps recommend taking advantage of our free returns policy to test and compare the various color temperature options and lamp quantities. Once you've made your mind, just let us know and we'd be glad to pay for return shipping and refund you for any returned items. 

6500K Flicker-free Lighting for Art Capture, Color Correction and Fine art Printing

I perform art to capture, color correction, and fine art printing. I am using Ikan Lyra LEDs at this time but not so happy with their results. They are okay, but I am looking for 6500K lighting, also flicker-free. I see you have bulbs and strips. 

We suspect that the primary reason for the difficulty in judging color differences is due to an incomplete spectrum emitted by the Ikan product. Specifically, this will likely be reflected in a low CRI value, possibly in the 80-90 range. (You may also want to look into the R9 value, which provides even more data about red color rendering in particular).

As a starting point, we would recommend experimenting with a few of our 95 CRI products. Here are the A19 bulbs which are daylight calibrated to D50 (5000K) and D65 (6500K) with a 95 CRI rating and would be a great starting point for your tests:

If you would like to consider our LED strip lights, we would recommend our FilmGrade LED strip lights which are offered in both 5600K and 6500K:

Our 5000K LED strip lights (also in 95 CRI) are listed under our retail & commercial section:

Installing the LED strip lights will require a bit of additional assembly and installation work. For additional guidance, we recommend referencing our layout maps which can be found at the link below:

​Finally, ​we would recommend taking advantage of our returns policy to test out several of the color temperature options and determine if our products do indeed offer an improvement over your current setup. The full policy can be found below:

High CRI 95+ 6500K E26 Color Grading room for editing, coloring matching, and finishing videos and still projects.

I'm looking for a lighting solution for a color grading room for editing, coloring matching, and finishing videos and still projects. In looking through your catalog, there appear to be several matches however they are not specifically listed under the color-matching category. Can you list every product that meets the above specs including non-E26 models?

Currently, the only E26 bulb that explicitly meets the D65 ISO color metric is the NorthLux 6500K A19 bulb. Please see below for the product link:

For non-E26, you may also be interested in our shop light and integrated fixture products, which are shown below:

The difference between NorthLux and Centric Daylight Lamps in color-accurate lighting application.

What is the actual difference between the NorthLux and Centric Daylight lamps? Is it just that NorthLux has RedBoost and R9 >90 whereas Centric does not, and is only R9 >80, or is there more?

I'm an artist and looking for the most color-accurate lighting option to redo my studio and the entire house. I use 4" T8 tubes in the studio. Would the D50 5000K series render more accurate colors than the NorthLux 5000K? 

I see you have the Absolute Series as well, but it appears to only be available in strips. Do you, or will you have bulbs and tubes available in this series as well? 

The primary difference between the NorthLux and the Centric Daylight is that the NorthLux has chromaticity points calibrated to D50 and D65 color points, for the 5000K and 6500K versions, respectively. While the Centric Daylight also offers 95 CRI, the exact color point is not as precise.​The NorthLux and D50 series are the same product listed on multiple pages. If you are looking for a color point that matches ISO standards, we would recommend the NorthLux / D50 product lines.​Unfortunately we do not have any lamps with the 99 CRI Absolute Series at this time.

Are the NorthLux indeed R9 > 90?

The NorthLux A19 has an R9 value of 90+.

Also, I'm just curious why, if the NorthLux are more finely tuned, are they and the Centric Daylight bulbs the same price? 

We intend to consolidate production for both the CENTRIC DAYLIGHT and NorthLux lamps into a single part number in the future, such that all products would meet the same D50/D65 standard. As such, the pricing was set to the same price point preemptively as we expect to offer the same product in the future.

Are there plans to make any Absolute series bulbs, even just as 4' T8 tubes?

We do have a few plans for future product development in the ABSOLUTE SERIES, but unfortunately, there are no specifics on that yet.

Absolute Series LED modules for a color matching to a Pantone swatch book and small item product photography.

I am interested in the Absolute series LED modules, I just realized the modules won't fit into the aluminum channels you offer, so I'm not certain what to mount them on or use as a diffuser. Do you have any recommendations? Is the type of diffuser material likely to affect the CRI at all? 

I was also wondering about the brightness - each module produces 800 lumens. 

I am also thinking about getting one of your dimmers, is the panel with 2 modules likely to be too bright to use at full strength? 

I was also thinking about trying the North Lux light bulbs, but wasn't sure about the socket type - I'm in the UK. I noticed the Centric Daylight bulbs have an E27 European option though, are those actually the same bulbs as the North Lux? What is the actual CRI for either of these bulbs? The item page says they have a CRI of 95+, and an R9 of 80+, but the photometric report seems to suggest both of these are much higher. Am I reading it wrong? 

I was planning on getting the D65 modules as I'm used to working with natural daylight color temperatures. The Pantone color bridge I'm using says to use D50 for color matching, is the D65 fine for this? Pantone has further confused me by using M1 lighting for the color bridge guide, but M2 lighting without UV for the online color finder - do the Absolute series modules qualify as M1 lighting (the D50 version anyway)? 

First of all, our ABSOLUTE SERIES LED modules sound like a great option to give you an excellent "building block" for building your own light panel. The 99 CRI is an excellent fit for many color viewing and color-critical applications.

​Whether or not you will need a diffuser will depend on whether there will be any potential for glare. If, for example, you plan on shining the modules directly at the illumination subject, there should not be any issues. For more information, we would recommend our blog article here:

​If you do decide that the aluminum channels and diffusers are indeed necessary, you may want to consider our flexible LED strip version of the ABSOLUTE SERIES as they will fit inside the aluminum channels without any issues.

Each module produces 800 lumens. It's a bit difficult to provide any recommendations as to whether this is sufficient or excessive for your needs, but you may want to take a look at our lumen estimation calculator, which you can find here:

​Alternatively, a useful rule of thumb is to remember that 800 lumens are approximately equal in brightness to a 60-watt incandescent bulb.

​Transitioning to our household lamp form factors, the NorthLux is not available in an E27 socket variant, so we would recommend our CENTRIC DAYLIGHT versions instead. For more information on E26 vs E27, you may want to reference our article here:

The CENTRIC DAYLIGHT versions also offer an excellent 95 CRI color rendering at 5000K and 6500K, either of which should work well for you. The only minor difference (as noted by their part number including or not including the letter "D") is that the NorthLux is calibrated to D50 and D65 color standards, which may be of interest to you.

The actual color rendering values will depend on the specific bulb. Our guaranteed values are 95+ and 80+ for CRI, respectively, but depending on the specific bulb, these values may fluctuate. CRI, for example, can be anywhere between 95 and 98.

Since you'll be using the lamps for digital arts (rather than printing and visual assessments) with monitors calibrated to D65, our 6500K or D65 product options sound like the best option for you.

Is there a recommended type of material for this, or will any type of translucent plastic do? Are there any materials that look appropriate but I should actively avoid them due to them compromising the CRI too much? If I use completely transparent clear plastic just for a protective 'lid' over the module, will this affect the color temperature or CRI at all? My gut says no on this last one, but thought it was worth checking in case there's something I'm not aware of.

Unfortunately, all materials will absorb and reflect a small portion of the light energy across the spectrum in slightly different ways. We generally recommend using polycarbonate, acrylic, or glass, as these materials generally alter the spectrum to the smallest extent. Some anecdotal testing on our end indicates that polycarbonate diffusers can affect the color temperature by 200-300K. CRI is generally not affected.

I was hoping you might be able to give me some quick advice on setting up the modules - I've made a basic diagram of my plan, but I don't have much experience with this sort of thing, so I was hoping you could take a quick look and see if it makes sense.

I've reviewed the drawing you kindly provided, and everything looks good and reasonable.

Hopefully, this makes sense, if not, let me know! I will most likely put 3 modules on one panel and 2 on a separate one, but I am making the basic assumption that even if I put all 5 on the same panel using the same power supply, it should be ok, as the power supply is 24v, 60W, 2.5A, which seems to cover the minimum requirements for 5 modules, plus a bit extra - is it ok?  

Yes, the power capacity appears to be perfectly fine for this installation. The only thing to be careful of would be to make sure that the wires used to connect the modules have sufficient thickness. Generally, if you're just connecting a single module, you should be fine with 20 AWG or thicker.

Is it okay to use an inline switch sold as a 12V switch, as long as the amp rating is high enough? I found some that say 2 amp max at 12VDC, and one that says suitable for 5-24V but doesn't mention amps... They're all very basic barrel jack connected on/off switches that look identical, but I've read conflicting information online about this issue, mostly regarding the possibility of arcing with higher voltage, so I thought I'd better ask even though most people say it's ok. I'm guessing the current that will go through the switch will only be the 420mA / 10W for a single module though, given how it will be set up.  

There should not be any significant safety issues here, but we would recommend checking with the switch manufacturer to ensure that operation at 24 volts would be permissible. I believe that both the arc voltage, as well as current ratings, would both be of concern here.

Not too bothered about having to replace the switches if they break, but I don't want anything bad to happen to the LED modules. And I'm assuming that connecting and disconnecting the modules via just unplugging any of the connecting wires between the individual module and PSU while it's all switched on is a bad idea? This sort of thing is generally frowned upon, hence my idea about adding inline switches for each module for some brightness control... Sorry if any of these are silly questions, I'm learning this on the fly! 

There should be no issues with the modules, as long as they are not suddenly flooded with voltage or current.

As for the A19 style bulbs, does the article you linked basically mean it's always unsafe to use E26 bulbs in an E27 socket, even when they are compatible with 240V AC?

That is our assessment based on the dimensions and input voltage levels.

Would it be safe to use a NorthLux E26 bulb with a B22 (bayonet socket) to an E26 adapter at 240V? (E27 to E26 doesn't seem to be a thing...) Given that the product page says it's compatible with 240V AC, I assume I wouldn't have to use a step-down transformer or anything?  

Yes, the product is compatible with global input voltages and will operate with 240 volts AC despite having an E26 base.

Do you know if NorthLux bulbs (the D50 version anyway) conform to the M1 lighting standard at all? 

Unfortunately, our D50 products do not conform to the MIUV metamerism requirement for UV fluorescence. As such, you will see our conformance is limited to ISO 3664:2000 and not any of the later standards.

Do the lights emit anything into the UV range at all, or are they closer to the M2 UV-excluded type lights in that respect? Doesn't help either that the bridge guide uses M1 standards and photoshop uses M2 when the paper the guides printed on is full of OBAs.

All of our products do not emit any UV (defined as < 400nm) except for our realUV products.

Except for our ABSOLUTE SERIES LED products, the LEDs are based on a royal blue 460 nm emitter with phosphor downconversion, so virtually no energy is emitted below 430 nm or so.

I saw the section about white rendering on the Absolute series product page, does this mean they can activate the OBAs in paper and textiles, at least somewhat? 

You are correct that the ABSOLUTE SERIES LED products do have some potential to excite OBAs to improve white rendering. This is due to the underlying emitter being based on a violet emitter which peaks at 420 nm. You'll notice, though, that this is still well within the visible range of the spectrum and does not produce enough ultraviolet energy to provide meaningful improvements to MIUV rendering.

One thing you may want to look into is the realUV LED strip or floodlights​ in combination with our existing visible wavelength range products to improve UV rendering. Unfortunately, we don't have any test data or full solutions here, but this may be worth experimenting with on your end.

What is the difference between Centric and NorthLux lights, since they each have 5000K and 6500K temperatures?

What is the difference between Centric and NorthLux lights, since they each have 5000K and 6500K temperatures? Do these have the same spectral output and are simply the same lamp but in different product families? For backlighting, 35mm slides when photographing (digitizing) which would be better, a 6500K from the Centric or Northlight groups, or the 5600K Filmgrade since it is supposed to match the camera sensor more closely?

For our A19 lamps, the CENTRIC DAYLIGHT products and NorthLux products both have 95 CRI, but have slightly different color point tolerances, with the latter being more precisely calibrated for color matching and viewing applications.

Specifically, the NorthLux 5000K meets the ISO D50 color viewing standard and may be a preferred option for your camera application. (The products are distinguished by their part numbers, which are PN 4005.50 and PN 4005.D50, respectively).

Regarding color correction, the closest match to D50 with our NorthLux product will suggest that few to no color corrections would be necessary because most camera systems will have the D50 color point likely pre-loaded as their calibration point.

Our FilmGrade A19 is another option that provides the same 95 CRI spectral quality, with a slightly higher blue component compared to 5000K. The 5600K color point is commonly used for photography and cinematography applications and is commonly chosen where ambient lighting conditions are also calibrated to a 5600K color environment.

Given the 95 CRI and high R9 values, the color spectrum of the NorthLux 5000K has sufficient coverage for all wavelengths that the camera sensors are calibrated to.

Color matching for dental office lighting

I run a dental practice and am looking for better lighting in my office. I need to be able to match tooth colors with various shades of filling material (e.g. ceramic / composite resin). The industry recommendation is to use natural daylight / sunlight as the standard. I currently have 4-ft fluorescent T8 fixtures in my office. What LED tube product would you recommend?

We can completely understand why being able to properly match tooth color to filling materials would be crucial for your practice. With your existing fluorescent lighting, there's a good chance that what appears to be a color match in the office may not actually be a match under natural lighting!

From a technical specifications perspective, we would recommend 5000K with a high CRI, as this will allow you to match natural daylight / sunlight the best.

5000K is likely the most ideal color temperature for your application, as it offers a more neutral color point compared to 4000K (morning sunshine) and 6500K (blue sky). Perhaps most importantly, the high CRI value will ensure that the tooth and filling colors you see in the office are the same colors you will see under natural lighting conditions.

Please see below for our 5000K / 95 CRI product link:

These LED tube lights include DirectWire™ technology, so you'll be able to re-lamp your existing fluorescent fixture without having to worry about re-wiring or re-configuring the ballast connection. Simply remove the fluorescent lamps, and install our LED tubes and you'll be up and running!

Finally, we offer a 30-day free returns policy on our products, so if you're unsure, we recommend testing the lamps to see how they work out for you. If they aren't what you're looking for, we will gladly pay for return shipping and provide a full refund.

What is the difference between CENTRIC DAYLIGHT™ 5000K/6500K and D50/NorthLux™?

Several of our products are listed on multiple product pages for marketing purposes. This is also the case for the CENTRIC DAYLIGHT™ (5000K/6500K), D50 and NorthLux™ product lines.

The 5000K products below are the same underlying product:

PN 4005C.50: CENTRIC DAYLIGHT™ 5000KPN 4005C.50: D50PN 4005C.50: NorthLux™ 5000K

The 6500K products below are the same underlying product:

PN 4005C.65: CENTRIC DAYLIGHT™ 6500KPN 4005C.65: NorthLux™ 6500K

All of these products are calibrated to the D50 and D65 color standards for color viewing and other vision-critical applications at 5000K and 6500K, respectively. These products are all great lighting solutions for professional or color-critical applications, as well as specialty indoor lighting applications such as light therapy.

Note: this product page was updated in November 2021 to reflect the most recent changes to our product specifications and offerings. For customers who purchased these products prior to 2021, please reference the archived article here.

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.

[Archived] What is the difference between CENTRIC DAYLIGHT™ 5000K/6500K and D50/NorthLux™?

[ARCHIVED ARTICLE] This article has been archived as of November 2021 due to recent changes in our product specifications. Please see this article for the most up-to-date information on our current offerings. Customers who purchased our lamps prior to 2021 (lamps marked with PN 4005.XX rather than PN 4005C.XX) can continue to reference the archived information below.

Several of our products are listed on multiple product pages for marketing purposes. One major exception is our 10 watt A19 bulb product line, for which we offer the two part number variants for each of the 5000K and 6500K color points:


PN 4005.50: CENTRIC DAYLIGHT™ 5000KPN 4005.D50: D50 / NorthLux™ 5000K


PN 4005.65: CENTRIC DAYLIGHT™ 6500KPN 4005.D65: NorthLux™ 6500K

You will notice that the D50 and NorthLux™ product lines have a "D" prefix in the color temperature designation inside the part number. This signifies that these products are calibrated to the D50 and D65 color standards for color viewing and other vision-critical applications at 5000K and 6500K, respectively.

The CENTRIC DAYLIGHT™ products are also available in 5000K and 6500K, but they are not designed for color viewing applications. Specifically, they have a slightly greener tint (elevated Duv values), which is a closer approximation of the ANSI chromaticity targets for daylight color points.

In short, if you're looking for a lighting solution for a professional or color-critical application, we recommend the D50 / D65 designated NorthLux™ lamps. On the other hand, if you're using the lamps for indoor lighting such as light therapy, the CENTRIC DAYLIGHT™ lamps will be a great option.

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