The weight-brightness tradeoff in headlamps is real and quantifiable. Here's how the headlamps in this roundup map across that spectrum.
| Headlamp | Weight | Max Lumens | Price | Weight-Lumen Ratio |
|---|---|---|---|---|
| Nitecore NU25 | 1.0 oz | 360 | $30 | High (efficient) |
| Zebralight H53c | 1.6 oz | 500 | $80 | High |
| Petzl Tikka Core | 2.6 oz | 450 | $45 | Moderate |
| BD Cosmo 350-R | 2.6 oz | 350 | $40 | Moderate |
| Princeton Tec Remix | 2.8 oz | 300 | $40 | Low-Moderate |
| BD Spot 325 | 3.0 oz | 325 | $35 | Low-Moderate |
| BD Storm 500-R | 3.2 oz | 500 | $65 | Moderate |
| Petzl Swift RL | 3.4 oz | 900 | $130 | High |
| Petzl NAO RL | 3.5 oz | 1500 | $175 | Very High |
The Ultralight Case
At 1.0oz, the Nitecore NU25 is the clearest ultralight case in this roundup: 360 lumens, USB-C charging, IPX6, and $30. For gram-counting hikers, it's the headlamp that disappears into the kit without consequence. The limitation is output: 360 lumens is sufficient for established trails and camp use, not for technical terrain at speed.
The Maximum Output Case
The Petzl NAO RL at 1500 lumens and 3.5oz represents the maximum output end: 4x the output of the NU25 at 3.5x the weight. For trail running, technical alpine hiking, or anyone whose safety margin at night depends on seeing far ahead: the output is the priority, not the 2.5oz difference.
The Middle Ground
For most 3-season backpackers: the Black Diamond Storm 500-R (3.2oz, 500 lumens, $65, IPX8, dual power) covers the use case adequately with a feature set that most trips benefit from, without the premium of the NAO RL or the output limitation of the NU25.