These vertical blinds by Yoon-Hui Kim & Eun-Kyung Kim hold a little secret, a solar lamp. Here's how it works: the blinds, which are closed during the day, are outfitted with tiny solar pads mounted on the blinds' vertical slats. As the sun goes down, the pads lighten, revealing a luminescent floor or table lamp or even a chandelier. Why not just use some phosphorescent material? I'm guessing it might not cast as much light as the solar option, but glow-in-the dark paint could be a very interesting DIY option. Via.