Box
Box was modeled in Autodesk Fusion 360 around Emos LED night light P3310K with motion sensor. Parametric model is provided if you need to adapt it for the different light source.
It consists of two parts that can be disassembled and fit into each other. I print the cover with small supports under the protrusions.
Lithophane
I mainly drew my know-how for creating a lihophane and setting print parameters from this article:
https://blog.prusa3d.com/from-2d-to-3d-how-to-turn-a-picture-or-a-photo-into-a-3d-model_8882/
Used converter settings:

Material
I achieved the best results with Filament PM PLA+ White.
Enjoy!
The author marked this model as their own original creation.