An illumination system includes a plurality of illumination apparatuses including a sleeping location illumination apparatus provided near a sleeping location. Each of the illumination apparatuses has a light source configured to irradiate an illumination light, a control unit configured to control lighting of the light source, and a transceiver configured to transmit and receive a control signal including a lighting signal for lighting the light source. A control unit of at least one of the illumination apparatuses turns on the light source before a preset wake-up time and controls the transceiver to transmit the control signal to another illumination apparatus.