2 Lampadine LED Super Brite per Honda XR200R XR250 XR400R XR600R XR650R 12v 30w
And many others. and many others (see list below of just a few tractors they fit). They fit directly into your OEM wiring harness sockets. They are non-polarity, so you just plug them in. It is as easy as changing a light bulb.