The NiteRider Lumina 950 Boost is the ideal choice for serious cyclists, who travel in all riding conditions. It features a CREE LED, which produces brilliant and clear light, and can be set to shine at up to 950 lumens. It is crafted with a durable Dupont fiberglass reinforced nylon body, and includes an easy to install handlebar strap. The light operates in 6 different modes, which consist of 4 solid light modes, 1 flashing light mode, and a walking light mode. The NiteRider Lumina also features a built in, USB rechargeable, Li-ion battery, for added convenience.Features: Produces 950 lumens, perfect for all riding conditions 6 operation modes (4 solid, 1 flashing, 1 walk), including the Boost mode for 950 lumens High-end CREE LED for crisp and brilliant light Made of highly durable Dupont fiberglass reinforced nylon FL1 Standard IP64, water resistant Li-ion battery built in USB rechargeable with IntelliCharge technology to cut charging time in half Lock mode and low battery indicator