An RGB LED. By mixing the red, green, and blue colors, this LED can emit white light The first white LEDs weren’t explicitly white LEDs. Instead, red, green, and blue LEDs were packed into a ...

Enter LED bulbs. LED bulbs followed compact fluorescents (CFLs) onto store shelves in the early 2000’s as an even more ...

1 shows a white-light LED in action). It is possible to generate light in semiconductor materials (such as GaN or AlInGaP) by injecting electrons into the conduction band of the material and ...