While many bike taillights are available on the market, most of them are wireless and tap into the CanBus system, which is great, but only if you have a new bike and enjoy charging your helmet. My idea is to go back to the basics, tap into the brake light power and route it via a magnetic attaching power cord to an LED panel attached to anything you like. The mount can be 3D printed to match the shape of the back of your helmet making it more aerodynamic and aesthetically pleasing.