The invention relates to an operating unit (1) for lamps, in which a galvanic isolator (4) between a primary side, which comprises at least one circuit (2), and a secondary side, which comprises at least one circuit (3), is bridged by a radio channel (5). The lamps are supplied on the secondary side with respect to the galvanic isolator and the primary side is designed for connection to a voltage supply, in particular a mains voltage. The primary-side circuit (2) and the secondary side circuit (3) have a respective radio interface (2A, 3A) for establishing the unidirectional or bidirectional radio channel (5). The radio channel (5) lies preferably within a preferably metal housing (6) of the operating unit (1). Communication from the primary side to the secondary side and vice versa can be effected via radio through the radio channel (5).