This powerful rechargeable headlamp of Ledlenser (300 lumens) operates up to 60 hours on a full charge (box). He has a focusable and dimmable light beam. LedLenser is a Zweibrüder brand. They manufacture a wide range of torches, headlamps and diving lamps featuring the latest LED technology as well as, in most cases, the Advanced Focus System, one of the best focusing systems available.