We have built a number of props for cosplay that incorporated LEDs... but it was always hard to do. All of the soldering, writing software, picking a battery size... But why?
At DragonCon 2026:
Prototype A
The system has a controller and and LED strip. They are connected together with the cheap USB type C cables. The USB cables are very flexible and will not break. For power we can use any USB type C battery.