These are my favorite essential items to 3d print and build the lightboxes through the MakerWorld generator.
You really need a large printer. A core XY will provide higher quality, but this is the most versatile.
Creality K2 Plus 3D Printer
These multi colored COB lights are perfect for that rainbow effect inside the boxes. They also have a remote and an app. You'll find multiple lengths in their shop
PAUTIX RGB Smart IC COB LED Strip Light 6.56ft
SUNLU has some of the most vibrant colors in the widest range and a great price.
SUNLU High Speed PLA 3D Printer Filament 1KG Black
eSun has my favorite white and more options of colors when it comes to matching logos
eSUN PLA Basic 1.75mm 1KG Silver Filament
Flashforge AD5X 200mm build multi color 3d printer
Flashforge AD5X 3D Printer Multi-Color with Display Screen