The Bayco Handgun Weapon Light uses an LED rated at 850 lm working in conjunction with a high-efficiency deep parabolic reflector to create a usable beam of light rated at 245 m. This weapon light features a unique and completely ambidextrous dual dependent toggle switch on each side of the light to operate the momentary-on and constant-on lighting modes. The housing of the TWM-850XL is constructed from aircraft-grade 6061-T6 aluminum with a glass-filled nylon polymer battery door and toggle switches. Power comes from (2) CR123 batteries included. (Not compatible with rechargeable batteries.). The Bayco Handgun Weapon Light is the next light you need.