Max output: 580 ANSI Lumens on high; Max run time: 170 hours on low; Dual button tail switch for quick, one-hand operation. Mode switch provides good tactile feedback and is very easy to locate in the dark; Strobe can be activated with the Mode switch when flashlight is on or off; Forward tactical main switch with momentary activation; Maintains constant brightness with super high efficiency; Waterproof to IPX-8 Standard (up to 2 meters).