Best Overall · 1 of 6
BLACK DIAMOND Cosmo 350 Headlamp

- 350 lumens, 3 AAA included
- IP67, dual fuel (AAA or BD 1500)
- Dimming, strobe, red mode
Our take
A rugged, flexible hiking lamp with the best weather rating here.
Why it made the shortlist
The Black Diamond Cosmo 350 produces up to 350 lumens, runs on three included AAA batteries or the rechargeable BD 1500 Li-ion pack, and is rated IP67 for 30 minutes of submersion in 1 meter of water. Dimming, strobe and red night-vision modes are listed.
A low-profile body and adjustable headband suit long hikes and runs.
It suits hikers who want a dependable lamp that takes cells from any store. The brand is a known outdoor name.
What works
- Dual fuel: AAA or rechargeable pack
- IP67 waterproof
- Dimming and red modes
- Low-profile comfortable fit
Watch out for
- Rechargeable pack sold separately
- The catch
- Dry it out completely after wet use, per the listing.







