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Cosmo 250 Headlamp

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Why We Like the Cosmo 250 Headlamp

Throw the small and powerful Black Diamond Cosmo Headlamp in your backpack, pocket, or car, and don't be caught in the dark again. DoublePower LED lights up the night for long-range viewing, and two SinglePower LEDs maximize battery power while providing proximity lighting for reading or cooking at basecamp. Compact, lightweight, and easy to operate, this little lamp is an ideal light source if you're counting ounces or need a reliable backup headlamp.


  • Mid-tier headlamp is suited for evening hikes and dawn patrol tours
  • Tiltable housing allows effortless adjusting of your lighting angle
  • Three output modes let you brighten the way or conserve battery
  • IPX8 waterproofing is suitable for slot canyons and snowy conditions
  • Red light is perfect for campsite hangouts and trailhead meetups
  • Item #BLDZ95N
Power Source
3 AAA batteries
Batteries Included
proximity, distance, dimming, strobe, red nightvision, lock
[max] 236ft, [medium] 164ft, [low] 26ft
Burn Time
[max] 6 hours, [medium] 17 hours, [low] 200 hours
Claimed Weight
Recommended Use
backpacking, cycling, road running, trail running, weekend camping
Manufacturer Warranty
3 years