The Malkoff Devices M60 LED Drop-In Module features a patent-pending solid brass heatsink, fully-potted electronics, and optical beam projection (not a reflector). The optic on the M60 provides high quality illumination with a nice balance between throw and spill with a "soft edge" that only an optical lens can produce. It is original equipment in the Elzetta ZFL-M60 Tactical LED Flashlight and also fits many Surefire flashlights which use the Surefire P60 or P60L lamp. This includes Surefire models 6P, 9P, G2, G3, C2, C3, Z2, G2Z and their variants. The output of the Malkoff M60 is very bright with an honest 235 lumens out the front and a runtime of 1.5 hours at full output and a tactical beam for 8 hours on two 123A lithium batteries. Made in USA.