I put up dark curtains in my quilting room. I have windows on two walls. On the side wall, I keep the curtains open all the time as they face the woods on the northside so I don't get harsh sunlight or heat in that window. But, on the front wall, it faces West and I get the hot afternoon sun in those windows. I open them in the morning when I am working in the quilting room to let in the light, but close them in the early afternoon everyday to keep the bright sun and heat out. I would rather my curtains fade than any fabric that may be laying out on my work tables in the direct afternoon sun. They are on rods with large clip rings so they are easy to take down and put up, so I can toss them in the wash when needed.