Now exactly what advantages do LEDs have over other lights? For starters, they're extremely versatile. These things are very small and can fit pretty much anywhere inside the case with a molex connector within reach. The heat output is next to nil; LEDs generate very little. And finally, the power draw is significantly less than any gaseous lights.
FULL STORY @ MIKHAILTECH (http://www.mikhailtech.com/articles/lighting/lazerleds/)