Originally Posted by mistergreen
LCD colors are measured in kelvin as well. I think naturally they’re 5500k. For different colors, the lens is coated with a certain color.
Color temperature doesn't really apply to LEDs since they produce much of their light in very high peaks at specific wavelengths. Different phosphors are added to the LEDs to adjust their light spectrum so it is more useful, and that can make them provide mostly red, blue, etc. colors. That lets the manufacturer rate their LED lights by color temperatures comparable to fluorescent lights. Good LED lights have some very red diodes, some very blue diodes, and a good mix of other colors, so the light they generate contains most of the wavelengths of light needed by plants, plus a pleasing appearance for human eyes.