>>928745I would suggest you get a different headlamp—unless Black Diamond tweaked the design since last year. No one I've met who's had to use one of those has had anything good to say about it. The on/off mechanism invariably craps out after like a week of use, or just never really works that well to begin with. This could potentially put you in a really bad spot.
I actually think the rest of Black Diamond's headlamps are pretty good (and some of them are even pretty cheap) just not that one.