Stack lights show the status of a machine or station. I need this for a project and figured I'd share it. It is a single Solidworks part model with the appearances already applied. The part has configuratio for each state: red-on, amber-on, green-on. The colored lees look traparent in the Solidworks screen (even with RealView turned on), but they render correctly. If you do not plan to render them, adjust the traparency of the le appearances as needed.