LED's are solid-state semiconductor devices
that convert electronic energy directly into light.
LED's produce "cold" light which is very efficient
because most the energy radiates in the visible spectrum.
Incandescent, and to a lesser extent florescent lamps radiate
energy in the non-visible spectrum creating heat as well as
light.
By combining RGB (Red, Green, Blue) LED's, it is possible
to create an entire spectrum of colours as well as white light
- this is known as the "additive properties of light".
Color mixing is achieved by varying the voltages to each
of the RGB color arrays. The controller for this color mixing
may be either an external unit or it may combined on or in
the lighting unit itself.
