Inova T2TM-HB Lithium Powered Tactical LED Flashlight, Black High-powered, energy-efficient 50,000 hour LED with high, low, and strobe modes Mineral glass optical window with teflon seal to withstand environmental pressures Run time: high 3 hours 45 minutes, low 32 hours High: 155 lumens, low: 16 lumens, range 525 feet Water resistant IPX4 impact resistant 1 meter