Tactical 4 Light 520 Lumens Lumens Tempered glass lens with precision micro textured reflector Cree XM-L LED providing 520 ANSI lumens Compatible with both 2 x CR123 and 1 x 18650 lithium batteries Runtimes: High 2.7 hours / Med 7.3 hours / Low 295 hours Multi-function dual switch tail-cap with direct strobe access for single hand operation