I realize that the lighting in your work area is very important. I wonder if mine is sufficient.
My current (I rearrange the house when the whim overtakes me) work space is in the livingroom next to the (large) doorway to the kitchen.
Because this house sadly lacks enough windows (and I like houseplants) my kitchen is lit with a two tube, 4' fluorescent over-head fixture. And, instead of normal tubes, I've got two broad-spectrum "grow" lights. I really like the light it gives off.
That's part of my "indirect" lighting....on the other side of me, in the livingroom ceilingfan I've got "Reveal" bulbs (supposed to be a better light).
My work light, mounted on a bookcase with an adjustable arm, also has a "reveal" bulb.
I've taken my paintings outside and compared the colors....there doesn't appear to be any difference.
The only difference I have noticed is when I'm photographing my paintings. I have better luck photographing them in my kitchen...with no flash, than I do outdoors. Photos taken outdoors of canvases often looked washed out, either that or unwanted shadows appear.
I'm assuming that my light is adequate. But I'm curious as to what y'all use.