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Black Diamond Cosmo

Black Diamond Cosmo

Black Diamond Cosmo

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.

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