Streamlight ProTac 1L-1AA Ultra-Compact Flashlight packs a powerful punch with its 350 lumens. Small in size, but big in illumination, the newest addition to the ProTac series is a perfect everyday carry light. Streamlight ProTac 1L-1AA is a dual fuel ultra-compact programmable flashlight that accepts a single lithium or alkaline battery, providing you with ultimate flexibility in the field.