These little LED lights are awesome for finding your way back to camp. Matt's take on these:
The Burn time is rated at 15 hours--I like that. I've used the light for an entire season of guiding, (around campfire, to/from hammock, in the cave, around the house) and it's still not dead. It's not as powerful as the more expensive headlamps I have, but I find myself grabbing this one almost all the time. It's super light, long lasting burn time means I'm not always messing with new batteries and so inexpensive I can always have one on hand. It's water resistant, so I'm not submersing it, but for it's price range--it's a great little backup. It uses/comes with two CR-2032 batteries. Simple twist on/twist off. Super easy and quick adjustable camo headband comes in handy with my groups. Easily switches from head to helmet.