Reviewed by Hiker KT from NM on Sunday, March 17, 2013
You can probably find the specs online, but at "low" it is constant/regulated for 50H, at "high" it is 1H. The total duration is about the same for all brightnesses (100-120H). High is pretty bright. Strap and adjustment seem fine. The actual product says "waterproof". Some people said they prefer a more diffuse light, I like a focused beam.