ALKALINE BATTERY POWERED TACTICAL PENLIGHT About the size of a marker, with two AAA batteries, this ProTac fits nicely into your pocket and is big on function and performance. . C4 LED technology, impervious to shock with a 50,000 hour lifetime. LED Solid State power regulation provides maximum light output throughout battery life. 3 light output levels:. High – 80 Lumens, 1550 candela peak beam intensity, 80 meter beam distance, 1.5 hours runtime. Low – 10 Lumens, 200 candela peak beam intensity, 28 meter beam distance, 30 hours runtime. Strobe - 5 hours runtime.