Traditional lighting design techniques assume an empty room despite the fact that room contents such as equipment, furniture or machinery may adversely influence illuminance conditions within an interior. The last decade has seen a considerable research and development effort to produce tools and guidance for designers seeking to produce lighting solutions for non-empty interiors.This paper reviews the many advances that have been made, including the now widely available computer based design methods, and summarises the design guidance promulgated on the subject in the major codes and standards. A number of limitations in the existing work are identified and areas of necessary future development identified.
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