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Cosmo 350 Headlamp




Keeping is simple by providing the features you need and nothing extra the Cosmo 350 Headlamp has a max 350 lumen output, red night vision, and runs on batteries or the BD 1500 rechargeable Li-ion battery. View Details

Color: Dark Olive

Color Options
With 350 lumens of power housed in a super compact, watertight body, the Cosmo 350 is perfect for urban adventures and overnighters in the woods. The Cosmo's new compact body is more ergonomic with a lower profile for improved balance, and the updated user interface includes a second switch for easy lens selection. The new Cosmo 350 is also Dual-Fuel compatible, allowing you to power the light with either the rechargeable BD 1500 Li-ion battery or three standard AAA batteries. In addition, the updated optical efficiency not only provides brighter light, but also saves battery life. And thanks to its watertight construction, the Cosmo keeps lighting the way whether you're forced to bike home in the rain, or you're hiking back to camp in an unexpected downpour.

Product Features

  • Dual-Fuel: Maximum flexibility to utilize either Alkaline cells or a rechargeable Lithium Ion BD 1500 battery (sold separately)
  • 350 Lumen max output
  • Red LED night vision has dimming and strobe modes and is quickly activated with dual-button interface
  • Settings include dimming, strobe, red night-vision and lock mode
  • Multifaceted optical lens design
  • IPX8: Waterproof-Tested to operate at least 1.1 meters underwater for 30 minutes. If submerged, water may enter the battery compartment and it will still operate; it should be completely dried out after use in wet conditions
  • Integrated battery meter display shows % of power remaining


Dual Fuel Rechargeable

With our Dual Fuel technology, the user has maximum flexibility to utilize either Black Diamond rechargeable Li-ion battery packs (sold separately) or Alkaline cells.

PowerTap Technology

Instant transitioning from any setting to full power light output with the tap of a finger.

Digital Lock

Patented digital lock feature safeguards against accidental use when stored in a pack or pocket.

3 Year Warranty

We trust what we make because we use what we make. All Black Diamond lighting products are covered by a three year warranty policy.

Max Distance
Weight Without Batteries
IPX Rating
Max Burntime
[High] 64 m
[Medium] 45 m
[Low] 10 m
46 g[AAA] 79 g
[BD1500] 73.5 g
3x AAA (included)
BD 1500 Battery
IPX8[High] 350
[Medium] 175
[Low] 6
[High] 3/5 hrs
[Medium] 6/10 hrs
[Low] 200/225 hrs
AAA/BD 1500 Battery


WARNING: This product can expose you to chemicals including Bisphenol A (BPA), and Nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to