I think it's called the "Bright Ass Tailight" and most Harley shops cary them. I think they're about $200.00 but don't hold me to that. The light has a ton of different light patterns you can use. I think they should be stock on all bikes. Plan to get one myself one day.I was on the interstate and a harley came by me an put on his brakes. His tail light looked like a police stobe light. It really gets your attention. What was this and where can I get this set up? I feel like it would be a life saver.