What I did for any lighting that I needed was do a search on Amazon and found all kind of LED lights,3mm and 5mm that had free shipping,some came from Japan. I went to Radio Shack and bought resistors from 1-Mohm down to 100-kohm. For power supply I used an old cell phone charger,cut the cell phone plug adapter off and connect the power wires, the positive to a resistor and to the positive side of the LED and the other LED connection to the ground. I started with a high resistor and kept going down till I ended up with the brightness I needed.You can connect a lot of LED's through 1 resistor.Keep the resistor out in the open to help keep it cool and you can light everything you need to. LED's stay cooler than incandescent lights,and last a lot longer. I made a end of train light using the track power, a 22-kohm resistor and a 3v 2mm tower light that I found at the LHS. You can get a bulk supply of LED's for cheap so you can experiment,if you burn one out,go to a bigger resistor. Just another idea to try for lighting.