Black Diamond Cosmo 350 Headlamp

Color: Dark Olive
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Around the house, on the trail or at the campsite, the compact, watertight Black Diamond Cosmo 350 headlamp provides an all-purpose, 350-lumen beam and a red light function to light up the night.

  • Features

    • Dual-fuel design allows you to power the headlamp with 3 AAA alkaline batteries (included) or the rechargeable BD 1500 lithium-ion battery and charger (not included)
    • Settings include dimming, strobe, red night-vision and lock mode
    • White LED emits up to 350 lumens on max setting, 175 lumens on medium and 6 lumens on low
    • Red LED night vision has dimming and strobe modes, and is quickly activated with the dual-button interface
    • Multifaceted optical lens design
    • Integrated battery meter display shows the percentage of power remaining so you know when to replace the batteries
    • Digital lockout feature prevents accidental use when stored in a pack or pocket as a backup
    • IPX8 waterproof protection rated to operate at least 1.1 meters underwater for 30 minutes—perfect should you be caught in a downpour
    • If headlamp is submerged, water may enter the battery compartment, but it will still operate; it should be completely dried out after use in wet conditions


    View all Black Diamond LED Headlamps
  • Technical Specs

    Best Use



    Bulb Type


    Bulb Detail

    1 white / 1 red

    Red Light Mode


    Beam Type


    Max Light Output (Lumens)

    350 lumens

    Light Output

    High: 350; medium: 175; low: 6 lumens

    Max Beam Distance (m)

    64 meters

    Beam Distance

    High: 64; medium: 45; low: 10 meters

    Brightness Levels




    Average Run Time

    High: 3; medium: 6; low: 200 hours




    3 AAA alkaline (included); also compatible with BD 1500 mAh rechargeable (not included)


    5 x 4 x 2 inches

    Water-Resistance Rating


    Weight With Batteries

    2.8 ounces

  • Reviews
    53 reviews with an average rating of 4.5 out of 5 stars

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