Intro: Happy Fridge Lights
if you have an electric fridge then here is a simple modification, substitute the usual 15W bulb with a string of bulbs, salvaged from a set of christmas tree lights. in ireland and europe the mains supply is 240VAC so i used 20 bulbs of 12V each wired in series, in japan with 100VAC 8 bulbs would be good, and in the us of a 10 bulbs would do.
.... be wary and respectful of mains electricty..... it can give you a horrible shock, burn you, or permanently damage parts of you resulting in death. a safety measure to take is encase your project in plastic with no exposed metal parts.