Also, if you plan to judge color balance on transparencies, be sure that you find a light source with a high CRI (color rendition index) and a color temperature of 5000K to 5500K. Manufacturers of flourescent lamps often indicate that with a model number that includes the number 50 or 5000 in the name, like the GE Chroma50. Regular "daylight" flourescents are _not_ what you want for judging color. I'd give you more specifics if I knew the Australian market. There are even some 5500K LED light bars available on the web, which I plan to use on the next small lightbox I make.