Strobe Ready LED Flashlight. Features four additional 365nm ultraviolet LEDs; and instant activation of strobe in any state with unprecedented ease of use. Offers a tough; smart and practical lighting solution. With 365nm ultraviolet light auxiliary output; it is purpose-built for law enforcement and tactical operations. 5 1/4" overall. Black HAIII military grade hard-anodized finish aero-grade aluminum alloy housing. Intuitive Strobe Ready button design provides direct access to Strobe quickly; maximizing tactical power and self-defensiveness. CREE XM-L2 (T6) LED with up to 180m beam distance and 8100cd candlepower on high setting. Brightness and runtime with 18650 Li-ion battery: High 800 lumen output with 3 hour 30 minute runtime; Medium 400 lumen output with 5 hour; 45 minute runtime; Low 70 lumen output with 15 hour 30 minute runtime. Brightness and runtime with two CR123 batteries: High 800 lumen output with 1 hour 30 minute runtime; Medium 400 lumen output with 2 hour 30 minute