Lampadina Super LED per Motofalciatrice Honda H5013 H5518 RT5000 12V 25/25W 34901-706-000
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.