The old-fashioned way to do it is to use a mix of different lamps ... than the average LED light because they filter out some of excess yellow light for a better color temperature -- but those ...

The principle behind [TechMartian]’s approach is simplicity itself: shine different colored lights ... you know the color of the object. Their sensor uses a four-lead RGB LED, but we suppose ...

But LED lights can’t produce white without some extra steps. They need to either combine different LED colors (red, green, blue) or use a blue LED and cover it with yellow phosphor that filters ...

It uses hundreds of light fixtures of different types and configurations to give Cleveland its nightly display. In addition to the K&D team, there are several other hands keeping the LED light ...