Dorcy 41-4311 Z Drive PWM 2 AA Aluminum Slide Focus LED Flashlight, 500 LumenThe Dorcy 2AA 500 Lumen PWM Flashlight is an amazing new light which features 500 lumens of power and 3. 5 hours of run time on high. On low, the light has 150 lumens of power and 15. 5 hours of run time. Constructed of machined aircraft aluminum with knurled non slip barrel grip, this light is incredibly durable and has the look, feel, and finish of a much more expensive light. Precision action slide focus technology allows the light to be adjusted