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Daylight metrics and energy savings

Institute of Energy and Sustainable Development, De Montfort University, The Gateway, Leicester LE1 9BH, UK, jm{at}dmu.ac.uk

L Heschong, M Arch

Heschong Mahone Group, Inc., 11626 Fair Oaks Blvd, 302, Fair Oaks, CA, 95628, USA

E Lee, MA

Building Technologies Program, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Mailstop 90-3111, 1 Cyclotron Road, Berkeley, CA 94720, USA

The drive towards sustainable, low-energy buildings has increased the need for simple, yet accurate methods to evaluate whether a ‘daylit’ building meets minimum standards for energy and human comfort performance. Current metrics do not account for the temporal and spatial aspects of daylight, nor of occupants comfort or interventions. This paper reviews the historical basis of current compliance methods for achieving daylit buildings, proposes a technical basis for development of better metrics, and provides two case study examples to stimulate dialogue on how metrics can be applied in a practical, real-world context.

Lighting Research and Technology, Vol. 41, No. 3, 261-283 (2009)
DOI: 10.1177/1477153509339703


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