Waveform Lighting Blog


Top 4 things to consider when buying LED spotlights

Home & Residential Lighting

In recent years, you may have found that the halogen bulb you've been buying for years is no longer available at your local hardware store. That's because LED spotlights are quickly being introduced to the market as a more energy efficient alternative. With the transition to LED technology, a lot of the metri...Read More

How to open MYD and HAAS files for lighting photometric tests

Color Science

If you've worked around LEDs and LED lights for awhile, you've undoubtedly come across lighting photometric reports. If you have any files that end in .MYD or .HAAS, you will need special software to open these files. What is an MYD file? How do I open an MYD file? MYD f...Read More

Black body and reconstituted daylight locus coordinates by CCT (CSV/Excel format)

Color Science

Below you will find the coordinates in both CIE 1931 xy and CIE 1976 u'v' for both the black body locus and daylight locus, listed by 10K and 1K CCT increments. Alternatively, an interactive calculator is also available here. The d...Read More

What is the difference between the black body and the reconstituted daylight spectrum?

Color Science

The black body spectrum is a spectral plot of a "theoretical object" that emits radiation (black body radiator) at a particular temperature. The sun is often mentioned as an object that comes close to a true black body radiator, and this makes it relatively straightforward to calculate the solar spectrum based on Planck's l...Read More

Pros and cons of a 12V LED system

Home & Residential Lighting

If you've been shopping around for an LED strip or other LED product for RVs and vehicles, you are likely aware that these products do not run on line voltage (120/240 V AC) and instead, you will see 12V DC as a common option. Before you move forward with that purchase, see below for our list of advantages and disadvantages...Read More

Advantages of a 24V LED system vs 12V

Home & Residential Lighting

If you are considering purchasing lights for or installing a low voltage lighting system, you will likely have come across both 12V DC and 24V DC options. Oftentimes, the price and performance specifications listed will be the same, and you may be wondering, "what's the difference? Which one should I choose?" ...Read More

How to calculate the daylight spectrum (D illuminant)

Color Science

Measuring and characterizing the daylight spectrum can be challenging due to the fact that many factors affect it, including time of day, season and weather. That being said, it is oftentimes necessary to standardize the daylight spectrum and this is what the D illuminant attempts to do. The D illuminant can ...Read More

CRI/Ra test color samples (TCS)

Color Science

The Color Rendering Index (CRI) is a widely used metric to describe color accuracy and fidelity. It is calculated as an average score on 8 color samples (called TCS or test color samples), with an additional 7 supplemental color samples for the extended CRI (e) metric. Each of these scores is called Ri...Read More

What is CRI R9 and why is it important?

Color Science

CRI R9 is one of the test color samples (TCS) used in the calculation of CRI. Because CRI is an averaged, single number, it can fail to capture the detail of how particular colors are rendered. To address this shortcoming, a closer look at the strong red test color sample (TCS9) is a common recommendation for...Read More

What is the difference between CRI and Ra?

Color Science

When comparing lighting products, you will undoubtedly come across the metrics CRI and Ra to describe color quality. You may assume that there is no difference between CRI vs Ra, but read on to find out how this could be a mistake!   CRI defined CRI is an acronym for Color Renderin...Read More

CRI/Ra TCS spectrum data (CSV/Excel format)

Color Science

We have published the CRI or Ra TCS (test color sample) spectrum data in 1 nm, 2 nm and 5 nm increments. There are a total of 8 regular test color samples, and 7 additional special test color samples. These samp...Read More

Getting started with LED strip lighting for your home

Home & Residential Lighting

LED strip lighting is a new type of lighting technology that has never existed before. As LEDs technologies have developed enough to be capable of emitting enough brightness and quality of light for general illumination applications, the use of LED strips for a wide range of applications has proliferated. In this article, w...Read More

Things to know about flexible LED strip substrates

PCB Designs

When you look at and compare flexible LED strip types, you probably focus on the color temperature, LED count and pairing the correct power supply for your purchase. But have you considered what the LEDs are mounted on, and how they are all connected? Today, we'll take an in-depth look at the LED strip substrate, and how so...Read More

How to choose a power supply for your LED strip project

Home & Residential Lighting

LED strips, unfortunately, are not as simple as traditional incandescent light bulbs when it comes to installation and set up. Because they run on low voltage DC, they require a power supply device that converts 120V/240V AC (depending on your location) into the voltage signal that LED strips can use. Below is our simple, n...Read More

How to choose LED strip voltage

Home & Residential Lighting

While searching for an LED strip light, you may repeatedly come across a voltage rating. But are you unsure what exactly it means? Do you know whether you should choose 12V or 24V? Read on to find out! Which is better - 12V or 24V? A common choice when choosing an LED strip is either 12V or 24V. Both ...Read More

LED strip light schematic and voltage information

PCB Designs

LED voltage crash course The voltage of an LED strip is primarily determined by: 1) The voltage of the LEDs and components used, and 2) The configuration of the LEDs on the LED strip. LEDs are typically 3-volt devices. What this means is that if a 3-volt d...Read More

What LED strip light color temperature should I choose?

Home & Residential Lighting

During your search for a white LED strip, you may have come across color temperature ratings. Not sure what it means or what to pick? Read on to find out! LED strip color temperature defined Color temperature is a way to describe the color of light emitted by a light source. It is meas...Read More

What is LED strip voltage drop?

Home & Residential Lighting

When working with high power LED strip projects, you may have observed firsthand or heard warnings about voltage drop affecting your LED strips. What is LED strip voltage drop? In this article, we explain the cause of it and how you can avoid it from happening. Why LED strip voltage drop happens Altho...Read More

How long do LED strip lights last?

Home & Residential Lighting

You may have become drawn to LED strip lights because of their long lifetime claims. But how long do they actually last? How is lifetime defined? If you're feeling skeptical, keep reading to find out how and when your LED strips may fail, and how manufacturers arrive at their lifetime claims. LED lifetime...Read More

Do LED strip lights require UL listing?

Home & Residential Lighting

If you've worked with electronics and lighting, you will undoubtedly have encountered the familiar UL marking. As a low voltage product, however, you may be wondering if 12V and 24V LED strips are exempt from UL listing requirements. Read on to find out! What is UL listing? UL, formerl...Read More

What does LED density on an LED strip mean?

Home & Residential Lighting

While shopping for LED strips, you may come across a number called "LED density" or a designation such as 300 LEDs. What does this mean? This is arguably one of the most important aspects of an LED strip so keep reading to find out what this means! LED count vs LED density LED count re...Read More

What is the CRI spec on LED strips?

Home & Residential Lighting

While looking at LED strip specifications, you may have come across the metric called CRI. Unlike color temperature, CRI is related to color but is a bit difficult to grasp at first. This post goes over CRI as it relates to LED strips. If you're interested in a ...Read More

What is the difference between LED package types such as 3528, 5050, and 2835?

PCB Designs

When searching for LED products, you may come across different 4-digit designations for LED types. When you first come across these codes, you may be very confused as to what they mean! Read on to find out the difference between common LED types and what to look out for. First of all, what is an LED packa...Read More

Color consistency in lighting products

Color Science

For white LED lights, color consistency can be a critical but often overlooked quality that can make or break a project. Read on to learn how and why color variation exists, and how to ensure you can attain excellent color consistency for your LED light project! What exactly is color consistency? In g...Read More

How to dim LED strip lights

Home & Residential Lighting

LED strip lights are great lighting tools for any project. But sometimes, you will want to have some level of dynamic control over the brightness of an LED strip, such that you can adjust the total amount of light needed for a particular scenario. If you are confused about how to get it done, read on to familiarize yourself...Read More

Calculate color temperature (CCT) from CIE 1931 xy coordinates

Color Science

Color temperature can be approximated using just a pair of xy coordinates from CIE 1931. Use the formula below, or simply plug in the x and y values into our online calculator. Looking to go the other way? See our CCT to CIE XY calculator....Read More

What is CRI? The ultimate guide to the Color Rendering Index

Color Science

Color Rendering Index (CRI) is an often misunderstood metric of color quality. Yet, for any application where color appearance is important, CRI consideration is critical. We've developed the following guide to help you understand what it is and how it can help you improve your quality of light. ...Read More

Calculate Duv from CIE 1931 xy coordinates

Color Science

The Duv of a color point in a chromaticity coordinate system can be used to describe its distance from the black body curve. Duv can be approximated using just a pair of xy coordinates from CIE 1931. Use the formula below, or simply plug in the x and y values into our online calculator. CIE 1931 xy to Duv...Read More

Color matching function (X, Y, Z) values by wavelength (CSV/Excel format)

Color Science

We have the color matching functions for each X, Y and Z available for download here. Click here to start the download in 1 nm increments.  ...Read More

What is D65 and what is it used for?

Task Lighting

What is white? A seemingly simple question can have many answers, depending on who you ask. And for many applications, the exact definition can have significant consequences. One such definition is called Illuminant D65. In this article, we'll go through the exact specification and how you can ...Read More

Color accuracy in lighting: artificial and natural lighting

Color Science

In our various discussions about color rendering and lighting quality, we oftentimes reference color accuracy. But what does it mean to be "accurate" and why do we care? We discuss this question in detail below.   The transition from natural to artificial lighting Ou...Read More

What is the difference between lux and lumens?

Home & Residential Lighting

If you're looking to understand a light bulb's brightness, you may see two metrics that may confuse you - lux and lumens. Both are related to brightness, but measure slightly different things. In this article we explain the differences between the two and how you can make sense of the metrics! ...Read More

What is the difference between PPFD and PPF?

Horticultural Lighting

If you're looking to understand how grow lights compare, you likely have come across the metrics PPF and PPFD. However, you might be confused about what these metrics mean, and how you can make sense of them to make an informed purchasing decision. In this article we go over the basic differences between PPF ...Read More

Micromoles to moles conversion and definition

Horticultural Lighting

A micromole is a unit of measure defined as 10-6 (one-millionth) of a mole. The symbol for micromole is commonly umol or μmol. A mole is defined as approximately 6.022140857 x 1023, so therefore a micromole can also be defined as: 1 μmol = 6.022140857 x 1017...Read More

Calculate CIE 1931 xy coordinates from color temperature (CCT)

Color Science

CIE 1931 xy coordinates can be approximated using color temperature (CCT). Simply plug in the CCT value into our online calculator. Looking to go the other way? See our CIE XY to CCT calculator. CCT to CIE 1...Read More

Calculate Illuminant D SPD and CIE 1931 xy from color temperature

Color Science

Illuminant D can be calculated from color temperature using our online calculator. Simply input the CCT and you will be able to download the corresponding Illuminant D spectral power distribution and CIE 1931 xy chromaticity point. Color temperature to Illuminant D SPD and CIE 1931 xy ...Read More

Luminosity curve data (CSV/Excel format)

Color Science

You can find the luminosity curve data in text format from the following link here....Read More