The Role of Lighting in the Search for Better Interiors-Some Problems

Abstract

Too often the lighting of building interiors is considered in isolation instead of as part of a total environmental design. This paper discusses some of the problems raised by the current trend towards higher levels of illumination, both with artificial lighting and daylight. The inter-action between daylighting and summer solar gains is discussed first, and particular stress is laid on building orientation and the use of artificial lighting to avoid unnecessarily large glass openings. The large heat loads imposed by lighting systems themselves are then considered, with the limitations of natural ventilation for removal of this heat. The impact of modern lighting trends on air-conditioning needs is discussed, in two parts, one dealing with the problems of peripheral zones and the other dealing with interior zones. Thermal discomfort from lighting fittings due to excessive thermal radiation at head level is considered in relation to Chrenko's researches. Finally the competition for space in the ceiling is discussed, and the possibilities of integration of different aspects of environmental design are explored briefly. The author suggests that the education of lighting specialists may have to be broadened, to make co-operation with other environmental specialists concerned with building design more effective.