Verified Buyer Reviewed by Ryan from Minneapolis, MN on Tuesday, January 29, 2013
This product appears to be a very good one. Especially for the cost of the unit. It claims to produce 55 lumens, and after using it a few times, I believe it does. Comparing it to other headlamps I have used, which are twice as bright, I still prefer this one. The reason I prefer this headlamp is due to the long runtime. My other headlamps are brighter, but I go through batteries every 8 hours. With the black diamond cosmo, I hardly ever need to change batteries due to a very long runtime.