A lighting system includes at least one lighting control console for controlling lighting devices, at least two redundant data networks, at least one conversion module, and at least one lighting device actuated by the DMX control data of the conversion module. The conversion module includes at least two redundant conversion devices. At least one switch-over device is interconnected between the two conversion devices on the one side and at least one lighting device actuated by the conversion devices on the other side. The two conversion devices on the one side and the switch-over device on the other side are connected to one another via at least one monitoring data line over which monitoring signals are transmitted. The switch-over device can be switched depending on the monitoring signals.