I currently use this one at the link. It was a gift, or I may never have tried it. Uses 3 AAA batteries, and on the lower setting, lasts for many hours. The company is part of the Leatherman Group, so the quality is good. Since acquiring it, I’ve bought a couple other lights from them and they’re just as good. The headlamp gets used almost every night, mainly during the growing season so I can work in the garden without the blazing summer sun and heat here in New Mexico. If I need to ever replace this headlamp, I think I’d look for one that offered either a blue or red beam option to retain night vision, but like I said, this one was a gift.
http://www.ledlenserusa.com/seo-5-323.html#start=9
This light goes into my pocket every evening:
http://www.ledlenserusa.com/f1-163.html#srule=product-name-ascending&sz=36&start=3
You can see from all the dirt that it's had LOTS of use in closets, crawl spaces, attics, garages, sheds, etc. I picked it up on a whim at our local Ace HW store.