This is a border for your litophane prints. Back lighting can be easily done with a Ikea Vattensten 1 meter long LED strip. Feel free to use any other 1 meter long LED strips. Set your litophane print to a size of 200mm x 150mm for it to fit. After using the LED strip just glue in your litophane to the border. Then glue together the backwall with the border.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.