A surface mine which covers several square kilometers of land and where mining operations are carried out round the clock, systematic artificial lighting is necessary for providing safe and efficient working environment. Major problem in mine lighting is continuous changing of task place and poor surrounding reflectance. This signifies the scientific design of illumination system, which is very important for good vision, so that individuals may work therein with reasonable comfort. Also, advances in lighting technology have shown that there is a tremendous scope for energy conservation in...