This adapter is designed to mount an IKEA diode led lamp in a halogen spotlight hole on an IKEA cabinet. The adapter fits into a 66mm hole (odd IKEA spot hole diameter) and has an 80mm 1.5mm thin frame. The design has some leeway for the diode-led lamp to allow for 3D print tolerances (hole=52mm). I've included the 123d design files so you can modify this design to suit your needs, adapting it for larger or smaller holes. Using natural PLA, some of the LED light partially illuminates the frame.