Cosmic Brightz Rainbow Bike Lights. Roll in style with these bright and colorful LED bike lights that wrap easily around most standard bike frames. This light string–with battery pack, mounting strap, and cable tie included–measures 6.5 feet and can be cut to size. Stay bright through the night (and then some) with diamond-bright LEDs that last for 36+ hours. Weather-resistant. No tools required to install. Requires 3 AA batteries, not included.