OLIGHT S1 500 Lumen Cree XM-L2 CW Compact EDC LED Flashlight Cree XM-L2 CW LED. Maximum light output up to 500 lumens. PMMA TIR lens with a 90% light transmittance rate. 3 standard modes: 8 lumens, 80 lumens and 500 lumens. 2 special modes: 0.5 lumen moonlight mode and a 10Hz strobe mode. Runs on: 1x CR123A or 1x RCR123(Battery not included).