We're proud to offer the highest quality electroluminescent (EL) wire on the market today. Made by EddyLight™, this revolutionary product allows you to incorporate a flexible richly-colored wire of pure light into your designs. We have seen these used in a million different ways...from accent light under the edge of a bar or table to wedding table centerpieces, and much much more.

Each EL wire measures nearly 6ft long and is powered for up to 18 hours on 2 x AA batteries (not included)

Here's some more information about EL Wire from Wikipedia :

EL wire's construction consists of five major components. First is a solid-copper wire core, coated with phosphor. A very fine wire is spiral-wound around the phosphor-coated copper core. This fine wire is electrically isolated from the copper core. Surrounding this "sandwich" of copper core, phosphor, and fine copper wire is a clear PVC sleeve. Finally, surrounding this thin, clear PVC sleeve is another clear, colored translucent, or fluorescent PVC sleeve.
Diagram of El-Wire

An alternating current electric potential of approximately 90 to 120 volts at about 1000 Hz is applied between the copper core wire and the fine wire that surrounds the copper core. The wire can be modeled as a coaxial capacitor with about 1 nF of capacitance per foot, and the rapid charging and discharging of this capacitor excites the phosphor to emit light. The colors of light that can be produced efficiently by phosphors are limited, so many types of wire use an additional fluorescent organic dye in the clear PVC sleeve to produce the final result. These organic dyes produce colors like red and purple when excited by the blue-green light of the core.

A resonant oscillator is typically used to generate the high voltage drive signal. Because of the capacitance load of the EL wire, using an inductive (coiled) transformer makes the driver a tuned LC oscillator, and therefore very efficient. The efficiency of EL wire is very high, and thus a few hundred feet of EL wire can be driven by AA batteries for several hours.