I recently put on a Nates off road bumper and I needed to come up with lights for the plate. While searching ebay I came up with license plate light bolts. There no terribly bright but suit the purpose to pass inspection and look great I think. I mounted my plate on a removable receiver bracket and ran the light thru the tube with disconnect on the wires for easy removal. I wish I would have taken pictures while I built this I could have tried a how to write up.
This is them there are cheaper ones on there also, http://www.ebay.com/itm/300692499822?ss ... 1439.l2649