This lighted wall lamp will look great on your buildings! The large size is perfect for entryways in HO or O. The smaller is nice for side doors. We have already added a warm white light, with 14 inch twisted magnet wire. So you can run the wire inside of your building.
For 3 volt uses you are all set, just add power.
For 7-19 volt AC/DC/DCC we have a bridge rectifier/resistor harness you can attach to the light before you connect it to power.