Here is how these two headlamps compare on the numbers. The Cosmo 350 takes a modest overall edge, led by low weight, but the Tikka has its own case.
| Black Diamond Cosmo 350 | Petzl Tikka | |
|---|---|---|
| GearScore | 73✓ | 71 |
| Max lumens | 350 lm | 350 lm |
| Weight | 2.7 oz✓ | 3.0 oz |
| Beam distance | 70 m✓ | 65 m |
| Max runtime | 200 h | 120 h |
| Price | $30✓ | $35 |
| Battery | AAA | AAA |
| Water rating | IPX8 | IPX4 |
Highlighted cells mark the better spec: Cosmo 350 in blue, Tikka in amber. A blank spec is never counted as a win. Runtime is shown for context and is not scored, since makers publish it at different brightness levels. GearScore is the overall rating (0 to 100); re-weight it on the full headlamp comparison. Prices are current MSRP.
The Black Diamond Cosmo 350 against the Petzl Tikka is a study in priorities. The Cosmo 350 wins on low weight and longer throw, and the Tikka pushes back on value.
The Cosmo 350 is 10 g lighter, a longer beam (70 vs 65 m), and $5 cheaper. On the default GearScore the Cosmo 350 leads 73 to 71.
Pick the Cosmo 350 if you care most about low weight and longer throw, which makes it the better call for counting grams on long miles. Pick the Tikka if you would rather save the difference.
The Black Diamond Cosmo 350. It is 10 g lighter than the Tikka.
The Black Diamond Cosmo 350. It is a longer beam (70 vs 65 m) than the Tikka.
The Black Diamond Cosmo 350, 73 to 71 on the default algorithm. You can re-weight the factors to match your trip.
It depends on your priorities. Go with the Cosmo 350 for low weight, or the Tikka for the price. The spec table above shows exactly where each wins.