Hey Speedy, I use led lighting on my ships. They can be run on 1.5v up to 12v. I can run 50 leds on 9volts for a good while and on 12v for days. Also they do not get hot like the 3v bulbs. You can get them from just about anywhere they carry railroad model supplies and they come in all colors. They come as solids, or flashing aswell. Hope this helps.

Dennis