Comes on automatically when the power goes out, making it easy to find when needed the most. The bright white LED never needs replacing and the high capacity rechargeable 300 mAh NiMH battery lasts over 15 hours between charges in nightlight mode, 2-3/4 hours at full power. Features high beam, low beam and nightlight settings. 8 lumens. Typical weight is 3.6 oz with battery. Charging prongs fold in for comfortable grip. 4.97 in length x 1.86 in width x 1.35 in height. UL Listed.