Olight

Features
Upgraded Performance: It has a max output of 1,000 lumens and a max throw of 200 meters, as well as a 200-lumen low mode.
Flexible and Rugged: The rail mount features an adjustable locating block for a customizable fit on a variety of rails. A robust locking device ensures secure attachment while allowing easy, one-handed mounting and dismounting. The light will remain stably mounted shot after shot.
CR123A Battery-powered: Compatible with Panasonic, Sanyo, Energizer CR123A, Duracell 123, and Olight conventional rechargeable RCR123A.
Excellent Compatibility: Comes standard with both GL and Picatinny rail inserts for easy mounting to almost any short setup.
Truly Ambidextrous: Dual ambidextrous switches allow you to quickly and easily choose between momentary and constant-on modes with either hand while also giving access to the strobe.