Zettel'z 5 is a pendant lamp with lots of little bits of wire sticking out of it. On the ends of those wires are lots of little clamps, and in the clamps you put lots of little bits of paper (a.k.a. "notice sheets") to build the lamp shade.
An intriguing concept that gets more interesting, because those little bits of paper (31 in all) aren't there just to stay white. You -- or your friends, or even you and your friends -- are supposed to draw, write or scribble on them to make art. And that's what makes the Zettel'z 5 a very cool light. Costs about $805. Also available in a smaller model, the Zettel'z 6. (Yeah, I know, the smaller lamp has the bigger number. Go figure.)