So I'm pretty proud of my window furnishings project at my office. I have recessed windows that needed blackout coverage. I bought tension rods and hung two sets of heavy IKEA drapes from them – a dark color in back and white in front. Great, cheap blackout! The drapes are heavy, however, so I needed extra support. I ended up buying hardwood pole sockets for like $2.50 a set and used a dremel tool to carve them out to fit. Voila! Beautiful, functional blackout for $40 a window!!