This is the UFO fender I installed on my 1991 KDX200.
The bulb that came with it has no markings but appears to be an 1157 bay15d.
These are the three wires coming from the UFO tail light assembly. The white/green one is the brake light. The brown one is the ground and the white one is the running light. My bike has two black/yellow ground wires connected to the male connector. A brown wire along with a red wire carry the voltage to the other male connector. I left the white/green one unconnected.