My sewing room is about 12' x12'. I have a ceiling light/fan with 5 bulbs. The lighting is great. It takes CFL lights. They are 60 watts of light and use only 13 watts. They don't create a lot of heat. We got fixture and lights at Lowes. The bulbs do have mercury but Lowes takes used bulbs and disposes of them properly. Our landfill also has a proper disposal facility.
I have an Ott light that i use at night when working with black. (hard for me to see) It is only a small lamp but placed in the right place really improves my ability to see to sew on black fabric. I really like it.
Track lighting doesn't appeal to me. I think it puts other parts of the room in to much shadow. I like lots of light everywhere.