Abstract

Lighting constitutes a significant portion of building energy consumption. Automatic lighting control systems reduce energy consumption by decreasing operating time of lamps based on various factors like occupancy, time of day, availability of daylight. Various technologies exist that perform lighting control. These technologies differ in their input parameters, their control method, control algorithm, cost of installation, complexity of commissioning, etc. Each of the control schemes has a unique set of factors that affect their performance in terms of energy savings as well as user acceptance. This paper aims to investigate the various control system types, the development of their associated technologies, the savings reported from their application and the factors affecting their performance.