LED: Cree XHP50.2 Neutral White LED Nominal CCT: 5000K Typical CRI: 90+ Tint deviation: 3-step User Selectable Levels: 3 main levels (High, Medium and Low). Each main level can be programmed to one of its two sub-levels. The second sub-level of the each main levels can be further programmed to different brightness levels. Light Output (runtimes) High: H1 1616 Lm (PID, 2.5 hrs) or H2 1010 Lm (PID, 2.9 hrs)/579 Lm (PID, 3.1 hrs)/305 Lm (5.3 hrs) Medium: M1 147 Lm (12.5 hrs) or M2 65 Lm (27.5 hrs)/26.4 Lm (2.7 days)/9.9 Lm (7.1 days) Low: L1 3.4 Lm (17.5 days) or L2 1.06 Lm (2 months)/0.3 Lm (3.8 months)/0.08 Lm (5.4 months) Beacon Strobe Mode: 0.2Hz Beacon at Low / 0.2Hz Beacon at H1 / 4Hz Strobe at H1 / 19Hz Strobe at H1 Operating Voltage Range: 2.7V - 6.0V Battery: One flat top unprotected 18650 size li-ion rechargeable. Batteries are not included in the package. Parasitic Drain: Negligible (much less than the self discharging of a battery) Beam Type 17 degree hot spot 80 degree spill Dimensions Head Diameter: 0.95 inch (24.2 mm) Length: 3.85 inch (97.8 mm) Weight 1.4 oz (39 gram) 3.0 oz (84.6 gram) with ZL635 battery 4.4 oz (124.6 gram) with ZL635 battery and headband Features PID thermal regulated outputs (three highest output levels) Builtin battery protections with continuously monitored temperature, current, and voltage, plus a (2.7V) low voltage cutoff Battery capacity indicator (LED flashes 1-4 times, 4 short clicks to start) Automatic stepping down from High to Medium, and from Medium to Low when battery capacity is low Durable electronic soft-touch switch Smart user interface provides fast and easy access to all brightness levels and beacon-strobes. Precision machined unibody casing from premium grade aluminum bar stocks Proprietary heat sinking design bonds the LED board directly to the unibody aluminum casing Durable natural hard anodized finish (Type III Class I) Sealed and potted LED driver circuitry Corning Gorilla Glass Battery reverse polarity protection Orange peel textured reflector Waterproof to IPX8 (2 meters, 30 minutes)
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