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What’s the difference between RGB and RGBW LED lights?

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What’s the difference between RGB and RGBW LED lights?

Apr 16, 2021

1. What is RGB

2. What is RGBW

3. RGB vs. RGBW

4. Other Tips


When you need to purchase a colorful LED strip and send an inquiry to the LED strip supplier, you may be asked which model you will need, RGB OR RGBW. What’s the difference? The difference between RGB and RGBW has always been a hot topic for many people. They have been appeared for various lighting applications for many years and also had an impact on lighting design. Today, let us now see the difference between RGB and RGBW in detail.


What is RGB

RGB is based on multiple combinations of three optical primary colors, Red, Green, and Blue, and is designed from the principle of color light emission. To put it simply, it can be regarded as three lights of red, green, and blue. When their lights are superimposed on each other, the colors are mixed, and the mixed brightness is equal to the sum of the two lights. The higher the mixing degree, the higher the brightness, which is additive mixing.  

RGB LED strip


What is RGBW

RGB appeared earlier than RGBW and has a long history of development, which has brought more possibilities for achieving more LED lighting effects. In principle, pure white can be obtained by mixing the three primary colors of red, green and blue at a ratio of 1:1:1. But in fact, this kind of mixing is more complicated, and the white obtained is not up to the desired effect. You may have seen in advertisements or heard from marketers that RGB LEDs can produce "full-spectrum light" through the mixture, now we can tell you that it’s not true. In fact, RGB color mixing can indeed produce a variety of different colors. But just using the red, green and blue wavelengths is not enough to achieve cool, changeable functional lighting. Even if the standard RGB LED strip lights up in a ratio of 1:1:1, these three colors cannot produce white light. These three primary colors can only produce other colors similar to white by causing gray fading. There are no RGB LED lights that can achieve a true "full-spectrum" effect.

With the development of the lighting industry and market demand, the requirements for color richness continue to increase. Therefore, a new and upgraded version of RGBW LED has appeared! RGBW actually adds a white light-emitting chip on the basis of the previous RGB 3 in 1 chip. Or it can be said to be RGBW adds a white sub-pixel on the basis of the original RGB three primary colors to form a RGBW four-color pixel LED. 

RGBW LED strip


RGB vs. RGBW

The following content shows the differences between RGB and RGBW LED lights.


RGB LED Lights

RGBW LED Lights

Chip

3-in-1 LED chip

 4-in-1 LED chip

CRI

lower

high

Full Spectrum

No

Yes

Application

General functional lighting

Precise functional lighting

(1) RGB(3-in-1 LED chip): RGB LED lights is made up of Red, Green and Blue three primary colors.

     RGBW( 4-in-1 LED chip): RGBW LED lights is made up of Red, Green and Blue and White colors. The extra white color chip is not only added one white color but also can mix with the other 3 colors to produce more precise and vivid colors.

(2) CRI: RGBW has higher Color Rendering Index, so RGBW LED lights can reflect the original color of the object more truly.

(3) Full Spectrum: With the added white color, RGBW LED can display more kinds and precise colors to achieve a full-color lighting.

(4) Application: RGB LED strips are usually used for lighting projects without special requirements. RGBW can achieve more kinds of color mixing and has higher color reproduction. RGBW LED lights are suitable for complex and precise lighting scenes.

RGB vs. RGBW

Why do you need an extra white chip?


Although RGB can theoretically produce white light, in fact, it does not produce pure white light. But a dedicated white LED chip can provide a purer white and allows you to choose additional warm or cool white chips. The additional white chip also creates greater possibilities for color mixing with the RGB chip, presenting more and richer color changes.


Which one to choose between RGB and RGBW?


RGBW LED strip has two technical advantages:

1. The same brightness consumes lower power consumption, the same power consumption can achieve greater brightness.

2. The same power consumption can achieve greater brightness.

In addition, the RGBW LED strip has a larger application space because of the addition of a white light chip. Of course, the price of RGBW is also higher than that of ordinary RGB lights.

If you only need basic RGB colors and do not pursue further white adjustments, standard RGB LED strips are usually more cost-effective. However, if you really need white for some project lighting, then RGBW is a better choice, but you will get more powerful application functions.


How do I operate the addressable RGB/RGBW LED light strips?


Both have to change the color through the DMX512 protocol controller. The RGB line lamp achieves a colorful effect through three-color mixing, and the RGB mixing becomes white light.

The difference is: RGBW lighting controller has five outputs, and each color control requires one output and one for the power supply. Since RGB has one chip missing, only four are needed. The functions of the controls must also be different to control the white part of the LED in RGBW.


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