The Zebralight H503w headlamp has a maximum brightness of 330 lumens from the Cree XP-L2 easy white LED and can be powered by 1 x AA (alkaline, NiMH or lithium) battery.

Zebralight has long been known for producing the best 'pure flood' single AA headlamps available. Building on this heritage, the H503 features a high performance LED with a nominal CCT of 4500K, producing a neutral white, flood beam with no hotspots.

One short click on the head torch turns on the light to High and again to switch it off; two short-click turns on the light to Mid and three short-click turns on the light to the special modes. Press and hold the switch (for over 0.6 seconds) to cycle through Low, then Mid and High, simply releasing at the desired level.

For more advance operation and configuration, press and hold to cycle from Low to Mid to High, and release at the desired level to set. Double click the switch to toggle and select between the two sub-levels for that main level. Sub-level selections for the 3 main levels are memorised after the light is turned off and through battery changes.

The second sub-level (H2, M2 and L2) of each main levels can be further programmed to different brightness levels. At a main level, double-click 6 times to start configuration. On subsequent double-clicks the light will cycle through different brightness levels. When a configuration is finished, short click to turn off the light. The selections for the second sub-levels are memorized after the light is turned off and through battery changes.

Brightness Levels:
High: H1 330 lumens - 0.9 hrs runtime or H2 275 lumens - 1.6 hrs runtime / 198 lumens - 2.3 hrs runtime / 122 lumens - 4.2 hrs runtime
Medium: M1 65 lumens - 8.5 hrs runtime or M2 30 lumens - 21 hrs runtime / 12 lumens - 41 hrs runtime / 4.1 lumens - 4.5 days runtime
Low: L1 1.2 lumens - 13 days runtime or L2 0.31 lumens - 1.1 month runtime / 0.07 lumens - 2.2 months runtime / 0.013 lumens - 3.3 months runtime

Plus Beacon Strobe mode: 0.2Hz Beacon at Low / 0.2Hz Beacon at H1 / 4Hz Strobe at H1 / 19Hz Strobe at H1

Waterproof to IPX-8.

Includes: pocket clip, headband with black silicone holder, spare o-rings, 1 x AA alkaline battery.