Streamlight 4AA flashlights
Streamlight introduced a 4AA LED flashlight and announced upgrades to the original 4AA xenon bulb model. Both lights join the ProPolymer family. Both 4AA flashlights provide lasting power. The LED model delivers 84,000 millicandelas of light from a cluster of seven white LEDs, each of which lasts up to 100,000 hours. 
It can operate up to 155 hours on 
one set of batteries.