RGB Lights Vs. RGBW Lights – What's The Difference
RGBW refers to red, green, blue, and white light. RGBW was developed after RGB. If your science class serves you right, remember that there are three primary optical colors; red, green, and blue. RGB is based on numerous combinations of all three primary colors. The principle of color light emission is the basis of its design. RGB Lights can be described as three different colors: red, green, and blue.
https://www.ledlightexpert.com..../rgb-lights-vs-rgbw-