The invention provides a control device for controlling at least one wirelessly connected lighting device within a wireless network, wherein the control device comprises: a transceiver configured to overhear and transmit a message within the wireless network; a light sensor configured to detect a light signal comprising a temporal characteristic that is characteristic for a first artificial light source; a processor operatively coupled to the light sensor and the transceiver, wherein the processor is configured to: determine, based on analyzing said temporal characteristic, a first condition that the light signal belongs to the of artificial light source, and transmit a control message to the at least one wirelessly connected lighting device upon determining said first condition.