Exemplary embodiments represent an operating device (100) for a light-emitting means (12) with an interface (15) for the bidirectional data interchange with a control device (20), wherein the operating device (10) has an energy or power measuring device (25) for determining an energy or power consumption of the light-emitting means. In this case, the operating device (10) is designed to send information relating to the energy or power consumption to the control device (20) or is designed such that the information relating to the energy or power consumption is accessible to the control device (20).