Blackburn System X3 Bicycle Light Luxeon III emitter with steady and flash run modes 85 lumens of pure white light is equivalent to a 12-15W halogen Constant Current technology maintains near-full brightness throughout runtime 30, 70, and 100 percent run settings allow four to 14 hours of run time Lightweight five-cell NiMH battery with Supercharger achieves full charge in 3.5 hours