Cree Led Bulb R5 3.7-18V 500 Lumens for Surefire Flashlight Torch C2 G2 Z2 P60 P61 6P 9P G3 S3 D2 Powered by: CR123A 3.6 x3 or 18650 3.7v x3 Bulb life hours: Over 50,000 hours Max output: 500 lumens CREE R5 LED cool white With an OP textured reflector