how do mood lights change colour when they use a single bulb?

Question

how do mood lights change colour when they use a single bulb?

In: Technology

Answer 1

There is a LED inside with 3 or more RGB elements. 1 red, 1 blue, 1 green. These are able to make up all the colours you can choose from.

Answer 2

While it appears to be a single bulb, it’s actually three (or more) separate LED lights in the same casing, colored red, green and blue. Changing the color simply requires changing the intensities of each of the lights to achieve the specific combination for that color.