Switching Lights 

If a camera is connected to a light switch and has been configured accordingly, you can switch the light on or off in the Live view by clicking on . The light icon in the status display is blue as long as the light is on.

Switching the Lights of Other Cameras
Right-click on . All cameras connected to a light switch are listed in the context menu. To switch individual lights on or off, activate/deactivate the Lights function next to the camera name.
To switch all lights on, click on All on . To switch all lights off, click on All off .