brightness is about batteries these days with any decent led light. I use the Ultrafire UF-H2 bought on ebay. it's a great wide beam flood headlamp AA powered. it has the newer led which is really bright. problem is on max power u get 1 45m light, while med low gets you 5hrs or so.

I bring a spare AA battery since I like to use it alot while I hang out at night.