I just used two of the low voltage blue path lights (4 watt bulbs) from home depot. They are found where the replacement bulb for path lights are kept. The sockets are the hard part to find, I had some left over from lights I used around my deck. I bought a 500ma 12V power supply from Radio Shack, cut off the plug, wired the two sockets in parallel to the power supply, plugged in the bulbs, and rested the sockets on top of my lights. Moonlights for under $20.