In the Virtual 3D section of the Ribbon you can find a command that allows you to show/hide the lights in the project, as sometimes their graphics gets more confusion while working on the project.
The command is available both in Layout and Navigation window, but each one refers to its specific window.
Even if you hide lights in Layout and/or Navigation, their effect will remain during the Rendering process.
This article is valid for DomuS3D® 2017 and later versions