Nashbar RadBeam 300 Lumen USB Headlight. With a superb 300 lumens of light on its High setting, the Nashbar RadBeam USB Headlight is the perfect choice for lighting up the night. The RadBeam features a single Cree LED and provides four different mode settings to meet your needs when pedaling after dark. In addition to traditional High, Low, and Flash settings, the RadBeam offers a Light Sensing Mode setting that preserves battery power by sensing ambient light conditions and automatically reduces the beam brightness. Powered by an internal, re chargeable via included USB cable battery, the light is compact, lightweight, and can be mounted or removed quickly from the handlebar via a tool free mount. Pair with the Nashbar RadFlash Tail Light BN RFTL for a complete headlighttail light system.