Originally Posted by VIKTR
I know for sure I didn't
I had a 3v bulb and a 7.5v bulb
A 3V bulb will just burn out. A 7.5V will work but not very bright. I've never found a good way to get a good bright headlight off the white wire. You can make it street legal, but if you're trying to get a bright headlight you will probably need to go in a different direction. I quit messing around a long time ago and just run 12V batteries. I run a headlight, tail light, brake light, turn signals and horn. The 12V 7.5 amp hr battery lasts more than a week, then I just plug it in to charge overnight.