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  • 1 TriplePower LED and 1 DoublePower white LED emit 200 lumens of powerful long-range light
  • Waterproof housing protects against water immersion up to 1m for 30 min. (IPX8)
  • Settings include proximity and distance modes, dimming, strobe, red night vision and lock mode
  • Red night vision has dimming and strobe settings and activates without cycling through the white modes; red LEDs preserve your night vision and reduce eye strain
  • Sleek, low-profile design uses 3 AAA batteries


View all Black Diamond LED Headlamps

REI membership


Best Use Backpacking
Bulb Type LED
Bulb Detail 1 TriplePower/1 DoublePower/1 SinglePower LED
Red Light Mode Yes
Beam Type Flood / Spot
Max Light Output (Lumens) 200
Light Output 200 lumens
Max Beam Distance (m) 70
Beam Distance High: 70; low: 10 meters
Brightness Levels Multiple
Strobes 3
Average Run Time High: 30; low: 180 hours
Rechargeable No
Batteries 3 AAA
Dimensions Unavailable
Water-Resistance Rating IPX8
Weight With Batteries 2.9 ounces
Rated 5 out of 5 by from Essential equipment Bought this spur of the moment while in REI buying something else. Checked all of the other headlamps that REI had on display and really liked that this had a multifunction white light plus the red light. The switch was easy to use with good instructions to show the sequence to change the various lights. The red light was key during our camping trip in order to be able to see inside the hammock without making yourself night blind. The tilt feature ensured that I could put the light exactly where I needed it....and without blinding the person I was talking to! Worked beautifully and at a reasonable price. I would highly recommend it.
Date published: 2017-06-21
Rated 5 out of 5 by from Headlights I mainly got this for the red light to keep my night vision but the easy use and comfortable head band has made me a happy customer. I used it on the AT for about 8hrs straight and it has yet to dim
Date published: 2017-04-22
Rated 5 out of 5 by from Shines Very bright I got this for a present and have been useing it for some time and it works very well. would definetly reccomend it
Date published: 2017-04-12
Rated 5 out of 5 by from Great red light settings I've been looking for a great headlamp for less than $30 that doesn't have an annoying mandatory blinking red light setting, and this is it. Most headlamps with red light settings make you cycle through either white lights or blinking red lights, which both ruin the reason that I want to have red lights in the first place (maintain night vision and not annoy camp mates). This one not only has the ability to set the red light so that you can turn it on and off with a single click, but you can also adjust the brightness of the red light easily by holding the button down once it is set to the red light and release when it arrives to the desired brightness. Waterproofing, not just water resistance, sealed the deal for me. Icing on the cake was the user friendly settings to switch to a variable, bright white light for situations where you need to see more detail. Overall, great light with a fantastic red light setting.
Date published: 2017-05-30
Rated 5 out of 5 by from Great for setting up camp after dark. I bought this for an overnight backpacking trip. Very small, light, and bright. My first headlamp and I love it.
Date published: 2017-06-18
Rated 5 out of 5 by from Better than expected!!! Reading the instructions helped! You can adjust the brightness by holding down the on/off button. Its much brighter than I was hoping for! Well worth price!
Date published: 2017-05-11
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Are batteries included?

Asked by: Nrae
​Yes, 3 AAA batteries are included.
Answered by: REIservice
Date published: 2017-04-20

Will any of these items work on a helmet when in caves and/or mines?

Asked by: UVand77
​This does fit over a helmet for use in caves and mines.
Answered by: REIservice
Date published: 2017-04-17

does it tilt?

Asked by: abbg
​Yes, the Cosmo does tilt.
Answered by: REIservice
Date published: 2017-06-20

Does the Cosmo have regulated output?

Asked by: REI_Member
No, the Cosmo does not have regulated output.
Answered by: REIservice
Date published: 2017-06-09
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