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Black Diamond Cosmo Review

   

Headlamps

  • Currently 3.0/5
Overall avg rating 3.0 of 5 based on 1 review. Most recent review: January 14, 2014
Street Price:   Varies from $17 - $30 | Compare prices at 9 resellers
Pros:  Lightweight, small size, great price, incredible battery life
Cons:  Much less brightness than alternatives
Best Uses:  Applications where battery life is essential
User Rating:       (0.0 of 5) based on 0 reviews
Manufacturer:   Black Diamond
Review by: RJ Spurrier ⋅ Review Editor, OutdoorGearLab ⋅ January 14, 2014  
Overview
While this is a good headlamp, we implore you to spend another $10 and get the Black Diamond Spot which has much better beam brightness and quality combined with a very respectable battery life. The Cosmo is a middle of the road kind of light. It is average performance and average battery life at an average price. If you are on a budget, look to the Energizer 3 LED which scored just a little lower for a fraction of the price. Or if you're looking for a lighting powerhouse, check out the Coast HL7.

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  • Photos
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OutdoorGearLab Editors' Hands-on Review

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Spot mode
Credit: Shellay Glatz
Performance Comparison
Trail Finding
A score of 7 is very respectable, especially for a $30 headlamp. But if you spend just another $6, you get a trail finding powerhouse with the Coast HL7. As you can see in the beam comparison below, the coast shines much further.

Beam Distance Photos


Black Diamond CosmoCoast HL7

It's not the most apple to apples comparison, because the Coast gets that awesome beam throw by burning through batteries very fast. Perhaps a better comparison is with the Cosmo's big sibling, the Black Diamond Spot which has a solid battery life.
photo not found
ERROR: Invalid Beam ID Parameters: A=49174, B=4909, v=0

Close Proximity
This is where you see the big difference between the Spot and Cosmo. The Spot, in close proximity mode, casts a very even beam. The Cosmo has a hot spot in the middle and not very even light.
photo not found
ERROR: Invalid Beam ID Parameters: A=49174, B=4909, v=2

Battery Life
This is where the Cosmo stands out, a little. It lasts for 14 hours in our ANSI measured high mode runtime tests. This is much better than the Spot (5.2 hours), Coast (3.3 hours), and Icon (8 hours). But during that test, the beam power starts much lower on the Cosmo which does not make it the best apples to apples comparison. Confused? What is ANSI? See our detailed description in the Headlamp Review. We did not measure low mode runtime, but the Cosmo's claimed 250 hours is one of the highest of any headlamp in the review.

Brightness
This light casts a beam 45 meters in our measured max beam distance tests. This compares with 70 m for the spot and 128 m for the Coast. 45 m is not bad, it's just not that impressive for a $30 headlamp when the Coast goes three times as far for an extra $6.

Weight
At 90 grams, this is a compact but not ultralight headlamp. It is about the same weight as the Spot. For comparison, the featherweight champion Petzl e+LITE is less than a third the way at 26 g.

Value
The thirty dollar price point is a tough spot. Just a little more gets you the top scoring headlamps in our review. And for $12, you can get a headlamp that scores just a little lower.

Conclusion
This is a solid light but there are just too many competitors that either score much better for another $6-10 or just a little lower for much less money. The Black Diamond Spot gives a lot more performance for only $10. It has a nearly identical form factor with a much better beam. The Coast HL7 is a light-emitting powerhouse for only $6 more. And for a mere $12, the Energizer 3 LED scored just two points behind the Cosmo.

RJ Spurrier and Chris McNamara

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OutdoorGearLab Member Reviews


Most recent review: January 14, 2014
Summary of All Ratings

OutdoorGearLab Editors' Rating:   
  • 1
  • 2
  • 3
  • 4
  • 5
 (3.0)
Average Customer Rating:     (0.0)
Rating Distribution
1 Total Ratings
5 star: 0%  (0)
4 star: 0%  (0)
3 star: 100%  (1)
2 star: 0%  (0)
1 star: 0%  (0)


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Black Diamond Cosmo
Credit: Black Diamond
Where's the Best Price?
Seller Price
Amazon $17.45  -  42% off!
Zappos $26.99  -  10% off!
REI $29.95
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