My sewing studio has a large fixture with 4 bulbs in it plus I have floor to ceiling windows on 2 sides of the room there are also 2 skylights to provide more lighting on sunny days. Not so good on rainy days or snowy days. Even with all this I always think I could use more light. I keep all my fabrics in dark cupboards so they are not affected by the light. This is a huge thing to consider.