Made to hold Led string lights from Dollar Tree, unsure if switch will work for any other models. Picture frame is 101.6x101.6mm. I like to make my pictures 103x103mm, can make larger then align them when slicing to print. 

I printed with supports.

Link to make lithopane: https://itslitho.com

Light link: Christmas House Micro-LED String Lights, 3.25 ft. 10-ct. | Dollar Tree