Review on 🚴 Comistack Rechargeable Bike Wheel Lights: Set of Safety Warming Bicycle Spoke Lights with USB Charging - Perfect Gift for Kids, Friends, and Adults by Dustin Lannan

Easy installation, works very well. This gives you multiple color options with a solid or flashing light. It's fairly bright, although it doesn't light up the entire edge like it does in some images. Maybe it's because of my rims (road bike, black rims and spokes). In general, I liked it so much that I bought a second one for the front wheel. When you first get it it's hard to tell if it's on as the light usually works while driving. Charge it for 2 hours, press the button and then twist it on your finger or shake it a few times. It lights up to let you know it's working. From there, keep pressing the button until you find the color you want.