Design Considerations
Last Update: October 30, 2010
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Lighting Quality

An important trend in lighting philosophy and research is redefining lighting quantity (illuminance) as just one component among many of lighting quality. In the past, lighting quantity has held a dominant role in lighting design, most likely because it is a readily measurable aspect of lighting. However, defining overall lighting quality is highly elusive. Despite numerous attempts to create metrics of lighting quality, lighting quality remains a seemingly intangible combination of identifiable physical quantities, placed together in a particular order which is highly dependent on numerous factors involving space, finishes and activities. The current challenge for researchers is to provide more objective metrics of lighting quality to make it possible for more predictably successful projects of all types. While we await these objective metrics, this section reviews the lists of industry accepted criteria that are all considered when developing a lighting design.

Prioritizing Criteria
The design procedure recommended in the IES Lighting Handbook is based substantially on lighting quality. It embodies recent beliefs and findings about lighting quality in a manner that varies according to building type. Following the IES procedure is highly recommended, for at a minimum it helps the designer place the proper priorities on lighting quality as a function of space or activity.
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Design Considerations

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