Unbreakable polycarbonate lens with scratch-resistant coating Light output: 385-Lumen; high - up to 26,000 candela (peak beam intensity), 195-Lumen; medium - up to 13,000 candela (peak beam intensity), 95-Lumen; low - 6,500 candela (peak beam intensity) 3-cell, 3.6-Volt sub-C NiCd battery is rechargeable up to 1000 times Access any of the three variable lighting modes and strobe via the tail cap or the head-mounted switch, switches operate independently Runtime: high - up to 2 hrs.; medium - up to 3.75 hrs.; low - up to 7.5 hrs.; strobe - up to 5.5 hrs