LIGHTING SYSTEM, LIGHTING CONTROL METHOD, AND LIGHTING CONTROL PROGRAM

PROBLEM TO BE SOLVED: To provide a lighting system which can easily set a target value in color matching.SOLUTION: A lighting system 1 comprises a control IC 521 for controlling a dimming level of a plurality of LED units 6 with different luminous colors; a sensor part 12 for detecting brightness on a radiated surface, on which lights from the LED units 6 are radiated; a memory 512 for storing each sensor voltage value when a light of each LED unit 6 is controlled to a predetermined dimming level; and a microcomputer 511 for setting a target value based on each sensor detection value stored in the memory 512. The control IC 521 controls the dimming level of the LED units 6 so that the sensor detection value when the lights of the plural LED units 6 are controlled is almost identical to the target value.