Compact and powerful with a 275 lumen max output, the ProTac 1L Professional Tactical Flashlight from Streamlight is a versatile, easy-to-carry option for many uses. Using a white C4 LED, the flashlight is capable of running for up to 2 hours on high and uses 1 CR123A lithium battery for power. The flashlight also features a TEN-TAP programmable pushbutton tail switch which allows users to select between one of three programs for use: high/strobe/low, high only, low/high.