I bought the lights from IKEA in Renton, Washington 1800 - 656-2980 or ikea.com. They're the "Sexton" lights. However, there is a plastic "dome" that protrudes out the back approx 3/8". That is why I made the yellow wood ovals to mount them in. They also have flush mount halogen disks that look great also. 12v
halogen works either 12 AC (as made for inside the home with a transformer) or 12v
DC (which is the direct current from the trailer battery or univolt converter). I cut off the transformer, and wired directly to the old lighting wiring. I used a switch from Radio Shack on each light (the dark plastic dip switch next to the light itself).
I got my ideas from Uwe and Frank R. If you search the forums for "12v" you should get the threads. The hardest part was staining and varnishing the wood ovals, and then figuring out a mounting system.
"Rainy," Washington is almost everytime I step out of the house during the winter (although, in truth, this winter has been quite "balmy")
I actually live in Seattle.
If you are interested in the lights, and ikea won't ship, pm me. I'll be out of contact for awhile, and probably wouldn't be able to get to Ikea until June, but I'd be happy to arrange to purchase and ship for you.