Patent ID: 7633406

Claim:
A lighting control system, comprising at least one local device that can transmit a comparison result between a target illumination and a sampled illumination, and a plurality of lighting devices that can receive the comparison result and to which ID information is assigned, wherein the local device includes a storage portion in which target illumination information is stored, a sampling portion that acquires sampled illumination information that is information indicating an illumination resulting from light intensities of the plurality of lighting devices, a comparison portion that compares the target illumination information and the sampled illumination information, a first transmitter portion that transmits the comparison result in the comparison portion, and a second receiver portion that can receive the ID information of the lighting devices, and the first transmitter portion transmits at least one of the received ID information included in the ID information transmitted from the plurality of lighting devices, in addition to the comparison result; wherein the lighting devices include an ID storage portion in which the assigned ID information of their own is stored, a second transmitter portion that transmits the ID information of their own, a first receiver portion that can receive the comparison result and the ID information that are transmitted by the first transmitter portion, a judgment portion that carries out a predetermined judgment based on the received comparison result and the received ID information, a control portion that controls a light intensity in accordance with a judgment result of the judgment portion, and a light source whose light intensity is controlled by the control portion; wherein at least one of the first transmitter portion, the first receiver portion, the second transmitter portion and the second receiver portion is provided with directional characteristics; and wherein, in a lighting device that is included in the plurality of lighting devices and that received the comparison result and the ID information that are transmitted from the local device, when the judgment portion judges that the ID information of its own is included in the received ID information, the control portion controls the light intensity of the light source based on the judgment result such that the sampled illumination approaches the target illumination.