Nite Ize BikeLit Rear Bike Light - $7.95

Nite Ize BikeLit rear bike light is a simple, effective way to alert others to your presence, offering up a bright red light that mounts under your saddle fast and easy. Water-resistant design offers fast, easy and tool-free installation by attaching to the rails of your bike saddle. 2 light modes: flashing or constant glow. Easily replaceable two 2016 3V lithium batteries (included) offer a running life of up to 20 hrs. on constant or up to 25 hrs. flashing. - $7.95