Last week I shared the problematic entrance stairway in my apartment, and received excellent suggestions for repair. Since then, I've been scheming. After seeing one at a friend's place, I'm thinking about using a mirrorball-style pendant at the foot of my stairs. Here are some examples of how good they look in various settings.
The original design in this style is the bottomless Globo di Luce Pendant introduced in 1968 by Roberto Menghi. Tom Dixon makes a modern version with a clear glass bottom to complete the sphere, which is the fixture actually called Mirror Ball. He also does rounded shade pendants in different metals. There are countless other pieces in this vein available out there in cyberspace.