A procedure for determining target illuminances

David L. DiLaura, Rita M. Harrold, Kevin W. Houser, Richard G. Mistrick, Gary R. Steffy

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


The 10th edition of the IES Lighting Handbook will contain a new illuminance determination procedure. This article frames these recommendations within an historical context and describes how they are responsive to modern aspects of lighting practice. The new procedure: 1) has more categories with finer steps; 2) provides a method for 1interpreting whether the target value is a minimum, average, or maximum; 3) includes uniformity targets; 4) permits activity levels to be accounted for in outdoor environments; 5) accounts for occupant age; 6) provides a method to adjust photopic illuminance targets for conditions of mesopic adaptation; and 7) accounts for outdoor environmental constraints with the use of lighting zones. This new illuminance determination procedure has been approved by the IES Board of Directors.

Original languageEnglish (US)
Pages (from-to)145-158
Number of pages14
JournalLEUKOS - Journal of Illuminating Engineering Society of North America
Issue number3
StatePublished - Jan 2011

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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