An illumination apparatus adapted to be used with other illumination apparatuses, comprising: a light source; a detection sensor adapted to sense a presence of a moving object to thereby generate a sensing signal; a wireless communication unit adapted to wirelessly transmit the sensing signal to at least one of the other illumination apparatuses within a transmission range of the sensing signal and to receive a sensing signal from each of said at least one of the other illumination apparatuses; and a control unit adapted to control an output of the light source based on the generated sensing signal or the received sensing signal, wherein the detection sensor is adapted to output the generated sensing signal to the control unit, and wherein the illumination apparatus is configured to, if the detection sensor senses the presence of the moving object, wirelessly transmit the generated sensing signal to said at least one of the other illumination apparatuses and allow one or more of said at least one of the other illumination apparatuses to be controlled together, characterized in that the control unit is configured to, if the detection sensor senses the presence of the moving object, find a moving speed of the moving object and determine whether the moving object is a low-speed object or a high-speed object, wherein the moving object is determined as the low-speed object if the moving speed is smaller than a threshold and as the high-speed object if otherwise, and wherein the control unit is adapted to control the light source such that an illuminance of the light source is greater when it is determined that the moving object is the low-speed object than when it is determined that the moving object is the high-speed object. a light source; a detection sensor adapted to sense a presence of a moving object to thereby generate a sensing signal; a wireless communication unit adapted to wirelessly transmit the sensing signal to at least one of the other illumination apparatuses within a transmission range of the sensing signal and to receive a sensing signal from each of said at least one of the other illumination apparatuses; and a control unit adapted to control an output of the light source based on the generated sensing signal or the received sensing signal, wherein the detection sensor is adapted to output the generated sensing signal to the control unit, and wherein the illumination apparatus is configured to, if the detection sensor senses the presence of the moving object, wirelessly transmit the generated sensing signal to said at least one of the other illumination apparatuses and allow one or more of said at least one of the other illumination apparatuses to be controlled together, characterized in that the control unit is configured to, if the detection sensor senses the presence of the moving object, find a moving speed of the moving object and determine whether the moving object is a low-speed object or a high-speed object, wherein the moving object is determined as the low-speed object if the moving speed is smaller than a threshold and as the high-speed object if otherwise, and wherein the control unit is adapted to control the light source such that an illuminance of the light source is greater when it is determined that the moving object is the low-speed object than when it is determined that the moving object is the high-speed object.