For those of you with open shelves and storing your fabric the light can fade the edge of the fabric. I would put a curtain cover hanging from the top to cover the fabric. You could use those swing back rods depending on the width of each shelf unit. Another idea is to check into the vinyl they use to cover windows for uv protection. Not sure how readily available it is and how it would work for this application. For those without windows please note that even the lights in the room can fade fabric though not as fast as daylight and sunlight.
I'm in the process of moving, but I have some small storage cupboards that I plan on using and if needby I'll had a shelf or two. With the doors on the units the dust shouldn't be an issue. This way the fabric is behind closed doors to the light and then when I'm working in the sewing room I can open the doors and enjoy the view!
Pam M