Here's a 21st-century lighting idea that's a real eye opener. Lytec electric thread glows like neon and can be used in lengths of a few inches to thousands of feet. Even a 1000-yard piece only uses the energy of just one ordinary light bulb. The thinnest of these cool-to-the-touch wires is about as wide as thick piece of thread—1.3mm—and can be woven into clothing. Hook it up to a small battery and light yourself up like a Christmas tree. Available in a variety of colors, the stuff can also be used as accent lighting throughout the house, to trick out the interior of a car or computer, or to create some funky signs, too.
Lytec Electric Thread [Elam USA]