The LED list uses the two Z stepper motors as Attachments. The list are pressed in place around the motors.
You need a printer with (X or Y) of at least 340mm to print the list.
Use PETG because of the heat from the LED. PLA will presumably get soft.
The width inside the refector is 17mm,. I used 2 pieces 4mm wide strip side by side.
12V LED from Amazon, but any LED strip wil do.

12V LED driver from Amazon (110V to 240V to 12V):

The author hasn't provided the model origin yet.