Summary This is a parametric lens cover for overhead recessed lights. Simply input the measurements in mm for your light in either the customizer app or the openscad, render a new stl and print flat on any standard RepRap 3-D printer or similar. This component is part of an open source lab library, by the Michigan Tech's Open Sustainability Technology Research Group. For similar see the Open-Source Lab How to Build Your Own Hardware and Reduce Research Costs Print Settings Rafts: No