The present invention provides a system comprising a luminaire and a camera module. The luminaire and the camera module each comprise an interface for mechanically and electrically connecting the camera module and the luminaire with each other. The luminaire is configured to electrically supply the camera module with electrical energy via the interface of the luminaire and the interface of the camera module, when the interface of the camera module is electrically and mechanically connected to the interface of the luminaire. The camera module comprises a control circuit and at least one image sensor. The image sensor is configured to detect an image of an area within the detection field of the camera module and provide the image in the form of image data to the control circuit. The control circuit is configured to determine information on the area by extracting the information from the image data.