Lithophane is generated with
https://lithophanemaker.com/Lithophane%20Sphere.html
Moon Background
100
Parts:
Print with support :)
How to hold light bulb socket
Print bottom part with supports and not remove them (square 7mm holes) after You insert the lamp socket push those supports deeper, they should grab the socket and keep it down. An alternative would be to print those plugs separately.
The author hasn't provided the model origin yet.