Darken Your Bedroom and Keep Out Drafts

After our neighbors were vandalized, they installed outdoor motion detect cameras and flood lights. While I sympathize with their plight, I don't appreciate the blinding light that pours into my bedroom around the edges of my window treatments, keeping me awake. Did you know that medical research indicates that sleeping in a less-than-dark room can cause cancer, as the sleeping brain needs darkness to produce a helpful chemical process. Whatever -- I prefer sleeping in a very dark room!

I had some neutral colored foam boards (20 x 30 inches - basically a cardboard and foam "sandwich") leftover from a DIY project so I prop them against the window panes and draw the window treatments closed, which not only keeps out excess light but also wintry drafts. In the morning, when I open the drapes, I tuck the foam boards behind a bureau, allowing the sun to shine in through the glass. Last time I checked, one foam board costs $3.99, comes in many colors, and, now that nearby art shops and office supply stores have gone out of business, I can buy the boards at my grocery store in the school/office supply aisle.