Lighting system for a mass transport means, comprising: • a power supply device for providing a predesignated electrical power supply voltage; • a current-conducting device which is electrically conductively connected to the power supply device and to at least one light-emitting means ; and • a main control device which is provided to transmit an operating signal to the at least one light-emitting means via the current-conducting device; characterized in that • a first supply line and a second supply line form the current-conducting device, wherein the first supply line is connected to a first supply connection of the power supply device and the second supply line is connected to a second supply connection of the power supply device ; • the main control device is connected to the first supply line and to the second supply line ; • at least two illumination devices are provided, and each illumination device comprises at least one light-emitting means , a switching device , an auxiliary control device , and a measuring device configured as an ammeter, which are electrically conductively connected to the first supply line and to the second supply line ; • the auxiliary control device of each illumination device receives, via the first supply line and the second supply line , the operating signal transmitted by the main control device and controls an operating state of the at least one light-emitting means of the illumination devices as a function of the received operating signal; and • the main control device receives from the auxiliary control device , via the first supply line and the second supply line , an operating state signal of one of the illumination devices . • a power supply device for providing a predesignated electrical power supply voltage; • a current-conducting device which is electrically conductively connected to the power supply device and to at least one light-emitting means ; and • a main control device which is provided to transmit an operating signal to the at least one light-emitting means via the current-conducting device; • a first supply line and a second supply line form the current-conducting device, wherein the first supply line is connected to a first supply connection of the power supply device and the second supply line is connected to a second supply connection of the power supply device ; • the main control device is connected to the first supply line and to the second supply line ; • at least two illumination devices are provided, and each illumination device comprises at least one light-emitting means , a switching device , an auxiliary control device , and a measuring device configured as an ammeter, which are electrically conductively connected to the first supply line and to the second supply line ; • the auxiliary control device of each illumination device receives, via the first supply line and the second supply line , the operating signal transmitted by the main control device and controls an operating state of the at least one light-emitting means of the illumination devices as a function of the received operating signal; and • the main control device receives from the auxiliary control device , via the first supply line and the second supply line , an operating state signal of one of the illumination devices . <EOS>