I have switched most of my maglights over to led, i'm kind of a maglight addict, i own at least 10 of varying sizes, this pertain's to the 2AA model though. It's very simple, and makes a great running light backstage during shows, you can get the leds in all kinds of colors, the batteries last forever, and you don't blow up lamps. First go to radio shack or anywhere else you can get led's, and find one that is at least 3v, if you get one to small it could blow up, and be sure to look at how the led is focused, they come in varying degrees, from 5 to 50, i think, just cut the pins off a little longer than the standard maglight lamps, then insert it into the plug, if it dosen't come on, pull it out, and plug it in opposite how it was before, it should light up, and depending on the led you may have to drill a larger hole in the reflector, and seeing as how the led is already focused it's not a problem, but you have to leave the reflector in so the the light will turn off. I usually get somewhere around 50 hours out of a set of batteries, which i love becuause you don't have to worry about the batteries dying in the middle of the show. The light is less intense, but i feel that it's worth it for the much improved battery life, and you don't really need that much light backstage, just enough to see. The leds only cost a couple of dollars depending on what color you want.