Another thing to consider about flashlights heating up...having the body of your high output LED flashlight getting hot can be a good thing. Very bright LEDs tend to put out a lot of heat when they're operating, and heat is bad for LEDs. They're usually equipped with heat sinks, or at least some heat escape path, and generally the body of the flashlight is where the heat is going to be dissipated. If the flashlight body is cold after being on high for a long time that can be a sign of poor heat transfer, which can result in premature failure of the LED. I've even seen a few reviews of flashlights on Dealextreme (particularly on large lights like the ones with 3 cree emitters) where reviewers were afraid the light was poorly built because the outside of the light didn't heat up during normal use...