sean-h on Instructables made this impressive Sam Flynn costume from Tron Legacy using all sorts of EL goodies, and documented the build quite nicely.

Electroluminescent (EL) Tape/Strip Starter Packs! – 100cm – White, Green, Blue, Aqua and Red. Get glowing in seconds with our Electroluminescent (EL) Tape Starter Pack! This pack contains everything you need for your first EL tape project, even the batteries.

Includes:

• 1 meter long x 1 cm wide EL tape strip
• Portable 4xAAA inverter powerful enough to drive a full meter of strip
• 4 x AAA alkaline batteries to power the inverter and tape for 10 hours

Electroluminescent (EL) Tape/Strip Starter Packs! – 100cm – White Electroluminescent (EL) Tape/Strip Starter Packs! – 100cm – Green Electroluminescent (EL) Tape/Strip Starter Packs! – 100cm – Blue Electroluminescent (EL) Tape/Strip Starter Packs! – 100cm – Aqua Electroluminescent (EL) Tape/Strip Starter Packs! – 100cm – Red