Let me start of by saying. This Mofo is the brightest flashlight and most well made I've used. Package says 720 Lumens at two hours, and has 4 modes, High, Mid, Low, and Strobe. Has Ability to be mounted and has a pressure switch option. The "hit you in the face" end screws off, and Klarus filters screw on "red, green, blue, and white". Check it out: