If you find you get lots of sun and are worried about the damage, you can buy some of the backing that is used on curtains at places like Hancock Fabrics. Don't actually attach it to the quilt, but slip it into the clips. The rubberized side should face the back of the quilt. That will help even more with drafts but will definitely keep the light out.
I really like the quilt; the colors are beautiful. I haven't seen that pattern before.