Here is how these two headlamps compare on the numbers. The HeadLamp 425 leans on low weight while the Axis answers with brightness, so the pick comes down to which you value.
| BioLite HeadLamp 425 | Princeton Tec Axis | |
|---|---|---|
| GearScore | 73✓ | 70 |
| Max lumens | 425 lm | 450 lm✓ |
| Weight | 2.8 oz✓ | 2.9 oz |
| Beam distance | 85 m✓ | 35 m |
| Max runtime | 60 h | 50 h |
| Price | $60✓ | $80 |
| Battery | Rechargeable | Rechargeable |
| Water rating | IPX4 | IPX4 |
Highlighted cells mark the better spec: HeadLamp 425 in blue, Axis 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 BioLite HeadLamp 425 against the Princeton Tec Axis is a study in priorities. The HeadLamp 425 wins on low weight and longer throw, and the Axis pushes back on brightness.
The HeadLamp 425 is 3 g lighter, a longer beam (85 vs 35 m), and $20 cheaper. The Axis is brighter (450 vs 425 lm). On the default GearScore the HeadLamp 425 leads 73 to 70.
Pick the HeadLamp 425 if you care most about low weight and longer throw, which makes it the better call for counting grams on long miles. Pick the Axis if brightness matter more to you, or you are focused on your priorities.
The BioLite HeadLamp 425. It is 3 g lighter than the Axis.
The Princeton Tec Axis. It is brighter (450 vs 425 lm) than the HeadLamp 425.
The BioLite HeadLamp 425, 73 to 70 on the default algorithm. You can re-weight the factors to match your trip.
It depends on your priorities. Go with the HeadLamp 425 for low weight, or the Axis for brightness. The spec table above shows exactly where each wins.