Meg discusses lighting-
I am by no means a studio-level painter-
One fluorescent style lamp I have found useful is the full spectrum compact- not near as blue as as the daylight and not too warm. The colors seem to come across pretty well from paint pot to model.
I also have one or two halogen desk lamps that have done well by my over the last 5 or so years I have been painting. I like to have a lot of light at my desk, so I use a combination of sources when I am working.