ABSTRACT
This chapter provides energy managers with an understanding of lighting fundamentals so that they can oversee successful lighting upgrades. However, due to substantial advances in technologies, today's lighting retrofits can reduce energy expenses while improving lighting quality and worker productivity. Task lighting techniques are discussed in greater detail. Lighting quality can be divided into four main considerations: uniformity, glare, color rendering index, and coordinated color temperature. Often lighting quality can be improved by supplementing the low pressure sodium system with other light sources that have a greater color rendering index. Occupants would see better if ambient lighting were reduced to 30-40 fc and task lighting was used to accent the task at 50 fc. Task lighting means retrofitting lighting systems to provide appropriate illumination for each task. Task lighting would create an environment where each desk is illuminated to 75 fc and the aisles only to 20 fc.
