The control device for controlling a therapy light source including an input for receiving information on an intensity and/or amount of light a person has been exposed to from a wearable device that can connect to the control device via the input. The control device further includes an output for controlling at least one therapy light source that can be connected to the control device. A control unit of the control device is designed to control a connected therapy light source dependent on the information on the intensity and/or amount of light the person has been exposed to. A wearable device that is suited to operate in combination with the control device includes a light sensor for detecting an intensity of received light. It further comprises a storage unit connected to the light sensor for storing at least one value related to the measured intensity of the received light.
