Black Diamond OnSight Headlamp

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Seeking additional climb time after the sun has set? The Black Diamond Onsight headlamp is a purpose-built solution developed after rigorous testing while night-climbing on limestone walls in Mexico.

  • Features

    • Dual-beam configuration provides 2 climb-specific modes: Climbing Mode and Route-Finding Mode
    • Climbing Mode is ideal for illuminating the holds or trail directly in front of you with 300 lumens of wide, evenly dispersed light that doesn't glare
    • Route-Finder Mode adds a narrow, long-distance, 375-lumen beam helping you to spot anchors or search for trails off in the distance
    • Brightness Memory allows you to turn the light on and off at a chosen brightness without reverting back to full or mid power
    • Dual PowerTap™ technology makes it easy to toggle between Climbing and Route-Finder modes by touching either the right or left side of the front housing
    • Ultra-thin front housing has extra articulation built in, allowing you to get close to the wall and still see everything you need to see around you
    • With a waterproof rating of IP67, this light is fully submersible and dustproof, meaning it's completely sealed and won't be phased if you're caught out in the rain
    • Perforated elastic headband is breathable and lightweight
    • Dual-Fuel compatibility means this headlamp can be powered with either 3 standard AAA batteries (included) or a rechargeable BD 1800 lithium ion battery (not included)
    • 6-setting 3 LED battery meter
    • Digital lockout feature safeguards against accidental use when stored in a pack or pocket


    View all Black Diamond LED Headlamps
  • Technical Specs

    Best Use


    Bulb Type


    Bulb Detail

    2 LED

    Beam Type

    Flood / Spot

    Max Light Output (Lumens)

    375 lumens

    Max Beam Distance (m)

    85 meters

    Beam Distance

    High: 85; low: 8 meters

    Average Run Time

    High: 3; low: 100; reserve: 26 hours

    Regulated Output





    3 AAA/BD 1800


    4.75 x 3.75 x 2.75 inches

    Water-Resistance Rating


    Weight With Batteries

    4.75 ounces

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

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