RGBW is better? For Facade Lighting. Adding a W is not a matter of color rendering. Is it possible to call up a pure neutral light? Tested a bit, the color rendering does not decrease, it should be the reason for the white light, but the color saturation will be lost.
Color rendering is not achieved with RGBW, it should be focused lighting. The ratio of ambient light to accent lighting requires professional measurement and design.
This is the case. Some customers want to save trouble. They want to be able to color the same set of lights. Sometimes they want to use high-quality neutral light. If you use RGB to get warm white light, you can imagine how ugly it is.
In fact, there is no better place to go. RGBW mixed light, the measured data is very beautiful, the site visual inspection always feels "grey".
The problem of brightness, 4000K illuminance should be above 400lx, otherwise Ukrainian.
The spectrum excited by the phosphor is the “comfort spectrum” that many experts have repeatedly studied. The RGB blend is just a simple on-site blend. The uncomfortable feeling should come from this difference. Don’t be so simple, 160 lx already Very bright.