most lithium powerd lights are usually used in the high performance kind. For most situation that performance is overkill, but people just like things that can do much more than they actually need it to do. It's just like people driving SUV's in the city.

I'm trying to convert all my equipment to AA batteries, due to there avaibility and reasonable capacity. I only have problems finding a good headlight that i like and runs on AA's... I hate battery packs on the back of my head.