Abstract
In the past several decades, most lighting designers have been using the lumen to design an illumination system for interior spaces. This design approach would at its best produce a mediocre lighting environment and most likely waste considerable energy. As people become more energy conscious and better understood in human visual performance, many new concepts, and tools for interior lighting design will be generated. Among them are 1) new method of determining lighting levels required for the task, 2) the equivalent sphere illumination (ESI), 3) visual comfort probability (VCP) 4) new control devices, 5) daylighting, and 6) improved luminaries. Sophisticated lighting design techniques to embody these new concepts and tools must be developed in order to achieve optimal effectiveness in the system performance and attendant energy savings by the system. Discussed here are these new concepts and lighting design techniques which help to promote their applications.
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