Show Lights
From Nevercenter 3D Modeling Wiki
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Menu Path: Display > Show Lights
Description
Show Lights, when enabled, will display the geometry of any custom lights that you have added to your scene, allowing you to select and edit them. It is useful to disable the display of lights in order to keep the modeling space clear and uncluttered. This command will not enable or disable the effect of the lights on objects in the scene. The Use Scene Lights command performs that function.