My sewing room is in the basement so no direct light coming in. And all my fabric is in closets with doors, and all precuts are in file drawers. I recently bought a piece of fabric that has a fade line. I was using it as borders, so I just cut that narrow section out and resewed the pieces together. Any unfinished projects are put in tinted artbins. The lighting in the room, if strong, can fade as much as sunlight or bright outside light.