A method and a system control at least one lighting arrangement, in which the lighting arrangement modulates the light it emits by lighting arrangement data that contains an identification code identifying the lighting arrangement. A user control device is suitable to receive the light from the lighting arrangement and to derive therefrom the lighting arrangement data. The user controlled device measures a property of the received light, apart from it representing data, to provide additional data which is associated with the lighting arrangement which is associated with the identification code contained in the received data. Data about a location of the user control device is determined, the user controlled device transmits the data it gained, and a main control device is suitable to receive the data transmitted by the user control device and to control the at least one lighting arrangement dependent on all the data.