I have two 4' double-fluorescent fixtures hanging over my sewing tables, as well as the regular ceiling light. My fabric is in cabinets that have doors on them, so it's not exposed to light.
I'm up all night due to DH's work schedule, so I need lots of light. My sewing room is just 9' square, so the two fluorescent lights are enough. The walls are a very light gold color, and the fabric cabinets are off-white, which make the room seem brighter. :)