The compact M600V Tactical Flashlight produces 350 lumens of brilliant white light and has a visible strobe function; attaches to Picatinny rail with a thumbscrew. To switch between white light, disable and strobe modes you simply pull then twist the front knurled portion of the bezel. In either mode, the M600V's TIR lens produces a tight beam suited for short- to medium-range applications. The high-efficiency LEDs are virtually immune to failure since there's no filament to burn out or break.