Illumination system with comfort at low power consumption

An illumination system comprising:

• a plurality of illumination apparatuses that are placed on a first surface;
• a person position detection unit configured to detect a position of a person who is located in a space between the first surface and a second surface that is opposed to the first surface;
• and
• a control unit configured to control a lighting state of each of the plurality of illumination apparatuses in accordance with the position of the person detected by the person position detection unit, wherein
• each of the plurality of illumination apparatuses includes a first light source that irradiates the second surface with light and a second light source that irradiates the first surface with light,
• the control unit controls, among the plurality of illumination apparatuses, an illumination apparatus corresponding to the position of the person so as to turn on the first light source, and
• the control unit controls, among the plurality of illumination apparatuses, at least one of one or more illumination apparatuses that are each adjacent to the illumination apparatus that turns on the first light source, so as to turn on the second light source without turning on the first light source.