Abstract: A lighting system including a power control device for controlling illuminance of a lighting fixture by outputting current to drive the lighting fixture and controlling the current, a plurality of lighting fixtures each driven to be lit by the power control device, and a switch device incorporating an energy self-supplying unit converting an operating force of a switch button into electric energy. The power control device includes a first circuit section having a receiver for receiving a wireless signal having a predetermined frequency and a control signal generating circuit for generating a control signal according to the number of times of reception of the wireless signal and operated by a first power system and a second circuit section operated by a second power system and outputting current according to the control signal from the first circuit section, and the second power system is not operated when not outputting current.