What do you want to use it for? As a bike headlight head torches are not a very good idea as they blind oncoming traffic and do not show up unevenness on the road surface as well as a light that is positioned lower down. They are fine for an emergency, but nothing more. Around the tent, I find that the lower powered they are, the better, Again, one reason is that you do not want to blind other people, but you do not want to loose your night vision either. A low powered wide beam is most convenient in my experience. So the cheapest Petzl Tikkina is perfect for me. For weight weenies, Petzl also do an ultralight one.
Willem