>>283241No mention of Zebralight? Their headlamps are tops. I've got an H51Fw and plan to get the H502 also. The run on single cells (CR123, AA, and 18650), have a great UI, amazingly efficient drivers, programmable modes, and compact size. Lots of options for LED tint and beam pattern. Protip: if you're using it outside, get a neutral-white emitter. It'll render greens and browns more fully and won't mess with your depth perception like a cool-white emitter.