L4 LumaMax Digitally-regulated five-watt LED is bright enough for tactical use. Featuring a new click-on/off tailcap switch. Construction: aerospace-grade aluminum with MilSpec hard anodizing, stainless steel pocket clip, patented lock-out tailcap. Output: 65 lumens Runtime: 90 minutes Bezel: 1" tempered Pyrex Size: 5.05 " long, 3.4 ounces Uses batteries LIGHT-309