Brightside. Side Lights for Cyclists. Bright, Amber, Rechargeable, 36hr Battery 2.3oz Bike Light. Bright. Waterproof. Rechargeable. Light. Robust. Effective. *SIDE LIGHT USAGE* Clip to your frame and the amber side lights keep you seen at intersections where you are most vulnerable. *POWER* The high lumen CREE LED lights provide excellent visibility in traffic and sufficient light in dark streets. *RUN & CHARGING* From empty the light takes 3 hours to charge and will run for up to18 hours. The battery indicator will let you know how much charge is left and once it turn red, you'll get another 25mins of run time. * USB rechargeable Cree LED bike lights. Ideal commuter lights.