Comparison of Power Consumption Reduce Effect of Intelligent Lighting System and Lighting Control System Using Motion Sensors

Abstract

Designed in accordance with conventional uniform lighting systems, lighting control systems that use motion sensors allow lighting control per area because they only switch on the lights linked to the motion sensors. However, further power consumption reductions can be possible using a dimmer control for individual lights to supply the level of brightness desired by each worker (hereafter referred to as target illuminance) instead of the per-area method. In the present study, we therefore conducted a comparative experiment with regard to the power consumption of a lighting control system that uses motion sensors and a system that controls the lighting for each worker (hereafter referred to as intelligent lighting system). The validity of the power consumption reduction in offices where intelligent lighting system was introduced was determined using a comparative simulation. A simulation was performed for various worker patterns in a mock-up of an actual office environment to verify the validity of the proposed system. The simulation results showed the effectiveness of the proposed method under all work patterns and thus indicated that the intelligent lighting system saves more energy than the lighting control system that uses motion sensors.