A Power-over-Ethernet, PoE, lighting system comprising: - a first power source equipment, PSE, device, wherein the first PSE device is adapted to provide power based on: - a first power received from a first power source or - a second power received from a second PSE device, - the second PSE device for providing the second power to the first PSE device via a first fire-resistant PoE connection in case of emergency, - an emergency lighting device, coupled to the first PSE device via a second fire-resistant PoE connection, - a non-emergency lighting device, wherein the first PSE device is adapted to detect whether power is received from the second PSE device, and wherein the first PSE device is further adapted to: - provide power to the emergency lighting device based on the second power via the second fire-resistant PoE connection, if it has been detected that power has been received from the second PSE device, - provide power to the non-emergency lighting device based on the first power, if it has not been detected that power has been received from the second PSE device, wherein the second PSE device is adapted to provide control data via the first fire-resistant PoE connection to the first PSE device for controlling the non-emergency lighting device, and wherein the first PSE device is adapted to consider the provided control data only, if no power is received from the second PSE device. - a first power source equipment, PSE, device, wherein the first PSE device is adapted to provide power based on: - a first power received from a first power source or - a second power received from a second PSE device, - a first power received from a first power source or - a second power received from a second PSE device, - the second PSE device for providing the second power to the first PSE device via a first fire-resistant PoE connection in case of emergency, - an emergency lighting device, coupled to the first PSE device via a second fire-resistant PoE connection, - a non-emergency lighting device, wherein the first PSE device is adapted to detect whether power is received from the second PSE device, and wherein the first PSE device is further adapted to: - provide power to the emergency lighting device based on the second power via the second fire-resistant PoE connection, if it has been detected that power has been received from the second PSE device, - provide power to the non-emergency lighting device based on the first power, if it has not been detected that power has been received from the second PSE device, wherein the second PSE device is adapted to provide control data via the first fire-resistant PoE connection to the first PSE device for controlling the non-emergency lighting device, and wherein the first PSE device is adapted to consider the provided control data only, if no power is received from the second PSE device. - provide power to the emergency lighting device based on the second power via the second fire-resistant PoE connection, if it has been detected that power has been received from the second PSE device, - provide power to the non-emergency lighting device based on the first power, if it has not been detected that power has been received from the second PSE device,