A lighting system comprising a lighting device and at least one other device, the lighting device comprising - a light source for emitting light, - a first controller for operating the lighting device and for controlling a light emission of the light source, the first controller being configured to operate the lighting device in a first operational mode and to operate the lighting device in a second operational mode, - a first data storage storing an unique value (Uv) associated to the lighting device, - a first network interface for connecting to a network and for allowing the first controller to communicate with the at least one other device, the at least one other device comprising - a second data storage for storing verification values (V1, Vm, Vy) which relate to devices of the lighting system, the stored verification values (V1, Vm, Vy) representing a list of devices known by the lighting system, - a second controller, - a second network interface for connecting to the network and for allowing the second controller to communicate with devices being connected to the network, characterized in that: the first controller is configured to, at powering up of the lighting device, i) receive via the first network interface a verification value (Vy) from the at least one other device, ii) assess the verification value (Vy) in relation to the unique value (Uv) stored in the first data storage for determining whether the lighting device is known to the lighting system, and iii) control the lighting device in the first operational mode or in the second operational mode on basis of the assessment, and the second controller is configured to a) determine whether the lighting device is powering up and, when the lighting device is powering up, to b) retrieve the verification value (Vy) of the lighting device from the second data storage and c) transmit the retrieved verification value (Vy) to the lighting device via the second network interface. - a light source for emitting light, - a first controller for operating the lighting device and for controlling a light emission of the light source, the first controller being configured to operate the lighting device in a first operational mode and to operate the lighting device in a second operational mode, - a first data storage storing an unique value (Uv) associated to the lighting device, - a first network interface for connecting to a network and for allowing the first controller to communicate with the at least one other device, the at least one other device comprising - a second data storage for storing verification values (V1, Vm, Vy) which relate to devices of the lighting system, the stored verification values (V1, Vm, Vy) representing a list of devices known by the lighting system, - a second controller, - a second network interface for connecting to the network and for allowing the second controller to communicate with devices being connected to the network, characterized in that: the first controller is configured to, at powering up of the lighting device, i) receive via the first network interface a verification value (Vy) from the at least one other device, ii) assess the verification value (Vy) in relation to the unique value (Uv) stored in the first data storage for determining whether the lighting device is known to the lighting system, and iii) control the lighting device in the first operational mode or in the second operational mode on basis of the assessment, and the second controller is configured to a) determine whether the lighting device is powering up and, when the lighting device is powering up, to b) retrieve the verification value (Vy) of the lighting device from the second data storage and c) transmit the retrieved verification value (Vy) to the lighting device via the second network interface. the first controller is configured to, at powering up of the lighting device, i) receive via the first network interface a verification value (Vy) from the at least one other device, ii) assess the verification value (Vy) in relation to the unique value (Uv) stored in the first data storage for determining whether the lighting device is known to the lighting system, and iii) control the lighting device in the first operational mode or in the second operational mode on basis of the assessment, and the second controller is configured to a) determine whether the lighting device is powering up and, when the lighting device is powering up, to b) retrieve the verification value (Vy) of the lighting device from the second data storage and c) transmit the retrieved verification value (Vy) to the lighting device via the second network interface.