Nightstick, TWM-850XLS, Tactical Weapon-Mounted Light w/Strobe, 850 Lumens, 15,000 Candela, IP-X7 Waterproof, 1.75 Hours of Runtime, Black This weapon light features the ambidextrous Switch on each side of the light to operate the momentary-on and constant-on lighting modes. The housing of the TWM-850XLS is constructed from aircraft-grade 6061-T6 Aluminum with a Glass-filled Nylon Polymer battery door and toggle switches.