Features

Shine brighter with the Black Diamond Cosmo 250.

Black Diamond engineered the Cosmo 250 for the way you move. The compact, low-profile design stays put on your head and won’t bounce as you run, but the powerful 250-lumen light illuminates the trail ahead.

Powered by three AAA batteries, the Cosmo will burn up to six hours at max output and up to 200 hours on low. Black Diamond also included dimming, strobe and red light options to give you more versatility.

Backed by an IPX8 rating to keep it shining in the storm, the Black Diamond Cosmo 250 is a lightweight and powerful headlamp for all your runs.

Power + -

Maximum output on the Black Diamond Cosmo 250 is 250 lumens, which lets you see up to 72m ahead.

Battery Life + -

Three AAA batteries power the Cosmo 250 for six hours at max power and up to 200 on the lowest setting.

Features + -

IPX8 water rating to seal out storms; compact, lightweight construction fits easily in a pocket or pack and won’t bounce around on your head.