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 , <EOS>