A birthday present for my wife so she can see pictures of me and my son or our family. Has a good angle to place it on your desk.
The hole at the side is designed to hold a mounting socket like this one: https://www.amazon.de/gp/product/B00CI6ISMG/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1 (non affiliate link)
Inside i placed this LED matrix: https://www.amazon.de/gp/product/B06ZZX25VM/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1 (non affiliate link)
Maybe the LED matrix is even too bright but it is ok and the lithophane looks great. It is designed to hold lithophanes with 100x75mm. According to the accuracy of your printer you should generate the lithophane to have 100x75mm and print it with 98% or 99% size to pull it out more easy.
I think it can print without supports but as you see on the picture mine printed with supports in the middle for the top.
The author hasn't provided the model origin yet.