I remember we have bikes with bicycle light ten years ago, the wheel’s friction will make it glow when riding a bicycle, and now I have not found.
Here I have foud out a bike light—BikeLit is a simple light can be caught to keep in the wallet. When the dark is coming without lights, BikeLit can be installed on the brake line as a bike lights. It is so mini that it can not shine too far, after all, it is a light let people who find it ride over at least.
