Abstract: A lighting-system (100) for illuminating an environment, comprising a lighting module (111, 112, 113), a sensor (141, 142, 143) and a lighting-system control device (130). The lighting module (111, 112, 113) comprises a light source (121) for emitting light, and a programmable controller (122) configured to control an operation of the light source. The sensor is arranged to obtain sensing data from an area illuminated by the light source (121). The lighting-system control device (130) comprises a processor circuit (133) configured to apply an activity classifier to the sensing data to obtain an activity classification for the area, to determine lighting control data to change a light spectrum of the light source based on the activity classification, and to transmit the lighting the lighting control data.