Mountain Equipment Company

Black Diamond Cosmo 300 Headlamp


Colour: Aqua

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Available online

Free store pickup

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Rocksolid guarantee

Shop with confidence. If it’s not working out, you can return it (consumables, electronics, undergarments and swimwear excluded).
Really. If it's not up to snuff after you use it (a couple times) you can still bring it back. It lasts longer than 30 days, but not forever. We'll be fair about it.


Black Diamond bumped up the lumens on the streamlined Cosmo to a darkness defying 300! The mode button cycles through smooth dimming, flood and spot lighting, and a red night light.

  • Flood and spot light modes lighting for near or far
  • Smooth dimming feature dials in perfect brightness
  • Strobe mode helps keep you seen
  • Red light modes help preserve night vision, great on early morning starts
  • Intuitive 2-button controls for flipping between modes
  • IPX8 waterproofing protects up to 1m of submersion for up to 30 minutes. Note: If your light does get seriously wet, be sure to dry it out completely before storing it
  • Lock-out mode prevents accidental activation

Tech specs

Weight83g (Aqua)
83g (Graphite)
83g (Octane)
Ideal for
  • Camping and hiking
5 modes
Beam distance - low8m
Beam distance - high74m
Light source
  • 2 LEDs
  • 1 red LED
Burn time - low200 h
Burn time - high6.5 h
300 lumens
  • Wide
  • Spot
Flash modeYes
Red light modeYes
Batteries3 AAA (included)
Made inChina

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4 out of 5 stars with 17 reviews for Black Diamond Cosmo 300 Headlamp

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