I added this bar to my 3-wheel e-bike and I'm so much more visible at night now. It was easy to attach it and hook it to a 12v battery. I have a simple toggle switch located in the battery bag, and I use a 12 volt system separate from the 36 volt motor setup. I bought a motorcycle headlight that is controlled by the same switch.This setup is so much better than the rechargeable USB lights I used before. One switch for everything, and much longer life on the battery.