Power measurement system, method of synchronizing power measurement device information and method of displaying consumed power

摘要

A lighting system (1) according to an embodiment includes a plurality of lighting devices (9 and 10), and a host device (3) which controls the lighting devices (9 and 10). In addition, the lighting system (1) collects information according to a place where the lighting system (1) is installed. Then, the lighting system (1) performs, according to the collected information, a gradation control which turns on lighting devices at a periphery area which are installed on the periphery of lighting devices at a central area that are instructed to be turned on at a degree of dimming which is lower than a degree of dimming of the lighting devices at the central area.