www.petzl.com, 6 ounces
“Throw away all your old flashlights and headlamps,” said our tester after taking the NAO on a three-week road trip. “The reactive-lighting NAO is the only headlamp you’ll need, or want to use.” We don’t take the word “revolutionary” lightly, but the new NAO headlamp is worth getting excited about. In contrast to other lamps, the 400-lumen NAO has a beam that automatically adjusts to focus on your target. If you’re pouring over topo maps, the light adjusts to a wide beam with low output. When you look out the tent fly to see if it’s a raccoon or bear rustling by the picnic table, the beam focuses, with greater light intensity for—drum roll please—a distance of 300 feet. Other advantages include fewer manual adjustments and a better burn time than any other headlamp we’ve tested. The NAO comes with a single rechargeable lithium battery that’s guaranteed for 300-plus charges—we didn’t do the math, but that’s a lot of alkaline batteries you won’ t need to buy. Each charge provides nearly five hours of use in high Reactive mode (the auto-adjust) or eight hours in low Reactive. You can set the lamp on a constant function, which disables the sensor, but cuts significantly into the battery life, as the Reactive power setting really does make power use more efficient. The rechargeable battery can be replaced with 2 AAA batteries, but our testers swear that the rechargeable battery ups the lamp’s performance. We were leery of the downloadable battery management program that allows you to adjust the light intensity, burn time, and beam distance on a computer, but are happy to report that even techno-troglodytes found it easy (and fun) to customize the lamp’s performance. The easiest option is using the custom profiles pre-programmed to enhance performance for specific activities like climbing, running, trail running, and hiking. Two features worth noting: a big off-on knob that’s easy to manipulate with gloves or in the dark and a water-resistant shell that never leaked, even during a monster Texas monsoon that one tester encountered while night hiking up a mesa near Lajitas.