I use the Spot headlamp made by Black Diamond. It runs off 3 AAA's and is the brightest little booger I've used, although you it does have different brightness modes. This thing even has a 3 year warranty. It's a little pricey at $60 and I was hesitant on the purchase, but a buddy of mine who is a hardcore backpacker assured me that it was the absolute best in headlamps and I'm very glad that I purchased this thing.