Doubtful for colors unless you use glass paint from a arts and crafts store. As for the bulbs. The only info I could glean from the manual was 8V 300ma. Pull one out and match the shape of the bulb from http://www.wjoe.com/diallamps.htm From the shape of the mount, etc. I would think they are probably wedge base. If so use the 8v 250ma. wedge base bulb.