Do you want your Tron costume to glow like this one, created by designer Syuzi? Then you need to learn about electroluminescent wire. There's a great tutorial over on Adafruit that teaches you everything you need for Tron cosplay.
EL wire glows beautifully, is very bendy, and emits no heat, so it's the perfect glowing accessory for your cyber-body stocking. Want to know how to play around with it? Adafruit has an EL wire hacking extravaganza, which explains everything you need to know to strip, soldier, and power up your wires. Once you've got the power source attached, it's time to suit up and get on the grid!