TEN-TAP® Programming - Select one of three different programs: . . 1.) High/medium/low with strobe; 2.) High only without strobe; . . 3.) High/medium/low without strobe . . Four operating modes: . . - High for a bright super-bright beam: 375 lumens; 12,000 candela; 219m beam;. . runs 2 hours . . - Medium for bright light and longer run time: 150 lumens; 5,000 candela;. . 141m beam; runs 5 hours . . - Low provides a less intense beam and extended run time: 40 lumens;. . 1,300 candela; 72m beam; runs 20 hours . . - Strobe for disorienting or signaling: runs 4.5 hours Optimized electronics provide regulated intensity . . Gasket sealed, Borofloat high temperature glass lens . . IPX4 water resistant; 2m impact resistance tested . . Serialized for positive identification . . 6.4 in. (16.26 cm); 5.4 oz (153 grams)