Patent ID: 7635958

Claim:
A lighting control system, comprising two or more lighting devices and one or more illumination comparing devices, wherein the illumination comparing device is provided with an illumination sampling portion that samples illumination, an illumination information storage portion that stores illumination information indicating a target illumination, and a comparison result transmitter portion, wherein a comparison result in which a sampled illumination sampled by the illumination sampling portion and the illumination information are compared is transmitted to the lighting devices by the comparison result transmitter portion, the lighting devices are respectively provided with a transmitter-receiver portion having at least a receiver function, a judgment control portion, and a light source; the transmitter-receiver portion receives the comparison result sent by the illumination comparing device; the judgment control portion carries out a predetermined judgment based on the comparison result so that the light intensity of the light source can be controlled based on a result of the predetermined judgment, and the control of the light intensity includes light variation control in which the light intensity is changed from a current light intensity by a predetermined amount of light variation and return control in which a light intensity is returned to a direction reverse to the light variation control, and when the predetermined judgment of the selected lighting device is that a predetermined condition is met after at least one lighting device selected from the lighting devices has carried out the light variation control, a lighting device including at least one lighting device other than the selected lighting device is selected and the light variation control and the predetermined judgment using the judgment control portion are carried out in the selected lighting device, and when the predetermined judgment after the light variation control is that the predetermined condition is unmet, in order to meet the predetermined condition, the lighting device including at least one of the selected lighting devices carries out the return control to make the sampled illumination approach the target illumination.