A wind turbine includes a marking light system including a marking light for aerial traffic, a data source, including one light sensor, and a marking light controller for controlling the at least one marking light according to data of the data source, in particular sensor data of the light sensor, a wind turbine controller, a power line for the at least one marking light and/or one control line connecting the marking light controller to the wind turbine controller, wherein the wind turbine further includes a switching arrangement including at least one switching unit in the power line or the control line, wherein the switching unit receives a detection signal from an air traffic detection system and to turn the at least one marking light on or off when the detection signal indicates air traffic or no air traffic, respectively, in an area around the wind turbine.