I got a Zebralight about a week ago and while I think it's superb as a general area light, I really dont rate it at all as a headlamp. I bought the H50 because it runs on AA's which are available just about everywhere. The torch is ultralight, waterproof and seems tough enough, if a little on the thin side. But for a headtorch I dont like it. It's 100% flood, wide area, nil throw. That's OK for close work, but not good for walking in the dark. The lack of a focussed beam, means you need to run it on high to provide enough light if you are walking around. That means you get 1 hour run time - then time for a new battery. Not good. The body tends to slip and rotate under it's own weight in the glow in the dark holder which is irritating - I ended up putting some tape around the body to make it a tighter fit. The twist, twist again, then twist again mode selector is very fiddly when it's on your head and it gets very hot when it's on high. It wont replace my petzl.
But if you use the attached clip to clip it to the strap of a rucksack, it makes a great map reading light and an even better general area/tent light when you take your pack off and sit down. On medium mode, it's plenty bright enough for a tent light and lasts 16 hours I think. It's a keeper for that alone. The light is ultra lightweight, so no penalty and I carry AA batteries anyway. However, if I lost it, I'm not sure I would buy another.
On a related note, for those who are interested in an AA torch with amazing throw and output, there is a relatively new kid on the block - Nitecore. They make 2 AA torches based round a single cree Q5 emitter. Both are superb, the Nitecore Defender Infinity and the D10. Both are about £40 quid and the build-quality, output and functionality knocks spots off the Fenix. Both have 130 to 180 lumen output depending on battery type, both will run happily on regular alkalines, energiser lithiums, eneloops or 14500 rechargeable lithiums. Both are IPX-8 rated submersible. Both are beautifully machined and knurled - quality is very near surefire. The throw is fantastic - easily the equal of a surefire L4. They both have completely variable ouput and a memory. The NDI also has a strobe feature. Runtime is superb - 1.5 hours on high and 60 hours on low ....from a single AA, that is staggering.
Highly recommended.
http://www.nitecore.co.uk/