1.Lumen:1000 lm

2.Function:white light(constant on/ momentary on)

3.Battery:16340*1/CR123A*1/18350*1

4.The lumen is not constant, it will gradually dim with the power on time, and it will be constant after 5 minutes of power on 

5.Material:aluminum alloy

6.The working time will be different when use different kinds of batteries.