This is a simple ceiling lamp.  You will need the following LED kit
(Globe Electric 6" LED Integrated Ultra Slim)

Print instruction:

File “Ceiling Holder”: 
Printed with all default parameters in Bambu Lab Studio
Support enabled, but not really needed.

File “Light holder”
I changed the Fuzzy Skin option to Contour.  (point distance: 0.8, thickness: 0.3)

The box and light fit in the frame.

Globe Electric - Home US (globe-electric.com)

For the kit, here are some affiliated links.
[amazon - ca] https://amzn.to/3R7eKNb
[amazon - us] https://amzn.to/46NvizE