The present invention relates to a solid state lighting system which comprises at least one luminaire controller (208, 203), a plurality of light engines (201, 203; 301, 303) each being coupled to a plurality of light emitting devices (RG, B, A) and a single sensor (206, 306) coupled to each of the at least one luminaire controller (208; 308) for sensing the light emitted by the plurality of light emitting devices. The luminaire controller is adapted to control at least one of the plurality of light engines based on the sensing signal from the sensor (206, 306) such that a feedback control loop is implemented. A synchronization connection (205) is provided between the plurality of light engines (101, 103; 301, 303) to synchronize the plurality of light engines (101, 103; 301, 303).