i got a multi-led spot from surplustronix in auckland today, cost about $14 for the light and holder, needs to run off a 12v 200ma power supply. [im using one from a set of old computer speakers :] for each 200ma that the power supply has, you can run one - ie 600ma 12v power supply can run 3 in series. they have purple, white, red, blue, yellow and green. they also do 240v ones, a bit brighter but not much.