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Black Diamond
Cosmo 350 Headlamp

4.368421052631579 out of 5 stars
38 Reviews
$34.95
Color:Octane

Size:

Quantity


Why We Like The Cosmo 350 Headlamp

The simplicity of the Cosmo 350 Headlamp makes it a go-to choice for runs, hikes, climbs, or nights when a storm cuts the power to our house. With multiple burn modes and night light options, we can choose the best option to light our way. We really like its Dual Fuel design which lets us run it on its rechargeable battery or from three AAAs.


Details

  • Multi-use lantern for general recreation or around the house
  • Dual fuel flexibility for greater burn time if one source dies
  • PowerTap tech lets you switch modes with a tap of the finger
  • Integrated battery meter shows you how much juice you have left
  • Digital lockout button ensures it won't turn on in your pack
  • Has dimming, strobe, red night-vision, and lock mode settings
  • Item #BLDZ9ID
Power Source
Dual Fuel (rechargeable BD 1500 lithium or AAA batteries)
Batteries Included
3 AAA
Modes
low, max, reserve
Lumens
350
Distance
[max] 60m
Burn Time
[low] 200hr, [max] 4hr 15m, [reserve] 24hr
Strap
adjustable
Waterproof
(rating) IPX8
Manufacturer Warranty
3 years
Activity
hiking, running, climbing, weekend camping

What do you think about this product?

Overall Rating

4.5 based on 38 ratings

Review Summary

1 Stars - 3 reviews
2 Stars - 3 reviews
3 Stars - 0 reviews
4 Stars - 3 reviews
5 Stars - 29 reviews

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5 out of 5 stars

January 2, 2025

Bright, compact and tough

Perfect little head lamp, long lasting battery, doesn't care about getting wet, and bright enough for almost anything.

ILIR G.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

4 out of 5 stars

December 30, 2024

Great Light / Great Price

Picked up the Cosmo at the local Cabelas. What impresses me most is the runtime on low. Over 200 hours! Thats great for hiking into a hunting spot in stealth mode, or tieing fishing knots without spooking fish. Some of us don't need or want 1000 lumen, we want long dependable runtime. The Cosmo fits the bill.

Joe P.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

1 out of 5 stars

December 29, 2024

Not rechargeable

Familiarity:
I returned this product before using it

This product only comes with triple A batteries. You have to buy a rechargeable battery separately. That battery also requires a special charger which is ALSO sold separately. All in cost is almost tripled.

Displeased
5 out of 5 stars

December 21, 2024

Perfect

Use this for Nordic skiing at night. It’s very bring, and the adjustable light levels allow for the perfect reflection of light in every case.

Henry P.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

October 4, 2024

The little light that could

I bought this headlamp for a last-minute climbing trip since my usual gear was in storage, and I didn't have high expectations given its small size. However, I was pleasantly surprised by its performance. It provides enough light to make me feel safe, and it's both lightweight and comfortable to wear. Paired with the battery pack, the Cosmo offers decent battery life—not the best, but definitely better than I anticipated for the price. I'll definitely be adding this to my pack for future trips.

Fabian S.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

2 out of 5 stars

September 26, 2024

Let me down when needed

Timed a 9 hour hike wrong and ended up doing the last two hours in the dark. Was severely underpowered. I’ve used this before for cooking and hanging around camp and its fine, but not up to the job of hiking at night which is why I have it. Bought this to replace my old reVolt and wish they still made that model because it worked much better.

Scott
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

July 28, 2024

Simple and Bright

The Cosmo is one of the easiest headlamps to operate. Simply press the button for on and off and the other for color and level. Plenty of light and a small package. This is a go to headlamp for 99% of activities.

Ben S.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

July 25, 2024

Multi function bright light

I haven’t used it yet, but I light that it has multi functions so will be versatile for backpacking and upcoming travel to the Dolomites!

Melissa F.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

July 24, 2024

Always reliable

Easy to use, always reliable, ready to use with batteries. Have one in every pack!

lee k.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

July 23, 2024

Glow Up the trail!

I bought it to run an Ultra trail Mont Blanc serie and reault great. Very lightweight, really comfortable, powerful light!

Lucas L.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

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