When using the Scene Composer, deleted lights stay in the Scene Explorer Window. Clicking update does not help. Once you add something new to the scene it takes the place of the deleted light. It also occurs when linking in models. After deleting the mesh, the link reference still stays in the Scene Explorer Window.
Thanks, you say the lights get removed from the scene but remain in the SceneExplorer, did I understand that right?
That is correct the light is removed from the scene, but not the SceneExplorer. Same for the models that are linked in.