Print Owl, Base and Lid files at 0.2mm layer height and infill at 100% for best result, for pedestal as you want.
Sizes : Owl : 215.3mm x 279.6mm x 2.0mm - Base : 215.3mm x 279.6mm x 38mm - Lid : 215.3mm x 279.6mm x 14.5mm - Pedestal : 140.0mm x 140.0mm x 41.0mm
I recommend using these led strips which are 6.0mm wide and 2 meters in length : https://fr.aliexpress.com/item/33001173227.html?spm=a2g0s.9042311.0.0.614f6c375ffL9h
Use glue to fix parts together.