Estimation of potential energy savings of artificial lighting

Abstract

The energy consumption of daylit buildings can be considerably reduced if the artificial lighting is controlled in sympathy with natural lighting. Methods of lighting control and a model for estimating energy savings of artificial lighting is developed. It estimates hour by hour energy consumption of lighting and accounts for building orientation, direct sunlight penetration, external obstructions and shading devices. The model could serve as a useful aid to building design, but it does not establish the affects of decisions about daylighting on other building environmental factors.