The Fenix HL55 headlamp offers four brightness levels plus 900-lumen burst mode and 150-hour runtime from one 18650 battery or two CR123A batteries. Neutral white light means superior definition and penetration in high-humidity environments. A 116-meter carry distance reaches farther while the side switch on the head is all you need for ON/OFF, output selection and burst. With all-metal housing and ANSI rated, the HL55 matches all-season backcountry and cave exploration. Features Utilizes Cree XM-L2 T6 neutral white LED with a lifespan of 50,000 hours Uses one 18650 or two CR123A batteries 84mm Length 46mm Width 48mm Height 115 gram weight excluding batteries Instant Burst mode All-function switch in the head for easy and fast operation Digitally regulated output maintains constant brightness Reverse polarity protection guards against improper battery installation Made from durable aluminum alloy Premium Type III hard-anodized anti-abrasive finish To Fenix Flashlights Fenix H Series 900 Lumens; HL Series 18650/CR123 ;Blk