NiteRider Pro 1200 LED Headlight - Performance Exclusive Smart Charger juices up the 4-Cell Li-Ion battery in only 5 hours High-powered 1200 lumen Cree LED produces more light with less power and less heat Newly designed, triple custom made reflector and Borofloat lens work together to minimize light transmission loss and maximize light output for excellent optical clarity -- superseding internal reflectors or standard glass lenses Runtimes: 1 hours High (1200 lumens), 3 hours Medium (600 lumens), 7 hours Low (300 lumens), 12 hours Race (180 lumens) 24 hours Walk (80 lumens)