It's EL Wire, you can get it from amazon, ebay, adafruit.com, etc - really easy to set up.
Example product: https://www.amazon.com/Light-String-Strip-Power-Inverter/dp/B01IOKPPKM/ref=sr_1_7?ie=UTF8&qid=1545800524&sr=8-7&keywords=el+wire+12v
It's EL Wire, you can get it form amazon, ebay, adafruit.com, etc - it's just wired to the bikes electrical system - buy a 12v set. It's very simple to wire, can be bent and cut freely.
Example product: https://www.amazon.com/Light-String-Strip-Power-Inverter/dp/B01IOKPPKM/ref=sr_1_7?ie=UTF8&qid=1545800524&sr=8-7&keywords=el+wire+12v