Light Box for displaying lithophanes. Light extracted from a puck lamp that I got from Wal-mart and powered by a spare USB cable that I repurposed and soldered to it. 

Model fits a 100x100x3 Lithophane. F3D provided as there are parameters for the switch and cable holes (In retrospect I probably should have made the lithophane slot itself parametric, but I never claimed to be smart.)