A lighting device , comprising: a set up processor for carrying out a set up of the lighting device , identification data which identifies the lighting device , a security key, a random data generator , a communication unit , a volatile memory for storing control data, and a controller for controlling, after the set up is completed, an operation of the lighting device in accordance with control data stored in the volatile memory , wherein the set up carried out by the set up processor includes, upon powering up of the lighting device : - continuously sending out a message, cycling through all RF channels known by the lighting device, the message comprising the identification data and a random generated number, generated by the random data generator , the message indicating power up of the lighting device; - receiving, while listening on the RF channel through which the message has been sent, a confirmation message; - accepting, only when the confirmation message includes the random generated number and is authenticated with the security key of the lighting device, the confirmation message; - receiving, while staying in the RF channel in which the accepted confirmation message is received, control data, comprising a short address, network key, frame counter and data used for light control, via the communication unit ; and - storing the received control data in the volatile memory . a set up processor for carrying out a set up of the lighting device , identification data which identifies the lighting device , a security key, a random data generator , a communication unit , a volatile memory for storing control data, and a controller for controlling, after the set up is completed, an operation of the lighting device in accordance with control data stored in the volatile memory , wherein the set up carried out by the set up processor includes, upon powering up of the lighting device : - continuously sending out a message, cycling through all RF channels known by the lighting device, the message comprising the identification data and a random generated number, generated by the random data generator , the message indicating power up of the lighting device; - receiving, while listening on the RF channel through which the message has been sent, a confirmation message; - accepting, only when the confirmation message includes the random generated number and is authenticated with the security key of the lighting device, the confirmation message; - receiving, while staying in the RF channel in which the accepted confirmation message is received, control data, comprising a short address, network key, frame counter and data used for light control, via the communication unit ; and - storing the received control data in the volatile memory . - continuously sending out a message, cycling through all RF channels known by the lighting device, the message comprising the identification data and a random generated number, generated by the random data generator , the message indicating power up of the lighting device; - receiving, while listening on the RF channel through which the message has been sent, a confirmation message; - accepting, only when the confirmation message includes the random generated number and is authenticated with the security key of the lighting device, the confirmation message; - receiving, while staying in the RF channel in which the accepted confirmation message is received, control data, comprising a short address, network key, frame counter and data used for light control, via the communication unit ; and - storing the received control data in the volatile memory . <EOS>