I was stuck in a hotel room a few weeks ago and I don't really watch TV so I decided to paint a self portrait. It was pretty dark in the room but vanity lights over a mirror create surprisingly good light to work by. The problem was with the light behind me. It was difficult to see the colors I mixed so I stuck with a very limited palette to avoid making any garish colors.
The next morning when I took it outside to take a picture it was a lot better than I thought it would be. Maybe I should paint in the dark more often.