Black Diamond  Cosmo 300 Headlamp

This product is not available.

Shop similar products

Compact, water-tight, and packing 300 lumens of power, the Black Diamond Cosmo 300 keeps the light on the trail ahead when you get caught in the dark while walking, hiking or biking.


  • Updated optical efficiency with multifaceted optical lens not only emits brighter light up to 300 lumens on max setting, but also saves battery life
  • Updated user interface includes a second switch for lens settings, including proximity and distance modes, dimming, strobe, red night vision and a digital lock mode
  • Red night-vision LED has dimming and strobe modes that can be activated without circling back through the white modes
  • Digital lockout feature prevents accidental use when stored in a pack or pocket as a backup
  • Compact, low-profile ergonomic design with improved balance uses 3 AAA batteries (included)
  • IPX8 waterproof protection rated to operate at least 1.1 meters underwater for 30 minutes—perfect should you be caught in a downpour
  • If submerged, water may enter the battery compartment, but it will still operate; it should be completely dried out after use in wet conditions


View the Black Diamond Cosmo Product LineView all Black Diamond LED Headlamps

Technical Specs

Item #173963
Best Use


Bulb Type


Bulb Detail

White / red LED

Red Light Mode


Beam Type

Flood / Spot

Max Light Output (Lumens)

300 lumens

Light Output

High: 300; low: 4 lumens

Max Beam Distance (m)

75 meters

Beam Distance

High: 75; low: 8 meters

Brightness Levels




Average Run Time

High: 4 hrs. 15 min.; low: 200 hrs.; reserve: 24 hrs.



Water-Resistance Rating


Weight With Batteries


155 reviews with an average rating of 4.5 out of 5 stars

Loading Reviews...

Questions & Answers

Loading Questions...