My light isn't on my bike yet. Unbeknownst to me, since my bike didn't come with a headlight, apparently I need to pull the motor to access some wires, and then run new wires through the frame. The means getting the bike upside down and requires some tools I don't have. Also, the thick aluminum mounting plate with the 90 degree bend wasn't bent properly on my light, which means the headlight sits a bit crooked. Most people wouldn't notice, but I'm a little fussy about that sort of thing and noticed it right away. I haven't given up on it yet, though..