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Black Diamond Cosmo

Black Diamond Cosmo

Black Diamond Cosmo ($30): The brightest headlamp in our roundup, the Black Diamond Cosmo blasts 70 lumens of white LED light and gives you 150 hours of runtime on the highest setting from three AAA batteries. The light is dimmable and includes a strobe option or red LED light that preserves your night vision. 3.2 ounces.

The brightest headlamp in our roundup, the Black Diamond Cosmo ($30) blasts 70 lumens of white LED light and gives you 150 hours of runtime on the highest setting from three AAA batteries. The light is dimmable and includes a strobe option or red LED light that preserves your night vision. 3.2 ounces.