Procedure to determine background luminance for use in ESI and visual performance methods

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AuthorSearch for:
TypeArticle
Journal titleJournal of the Illuminating Engineering Society
ISSN0099-4480
Volume8
Issue1
Pages1518; # of pages: 4
SubjectLighting; luminance; visibility; adaptability; Lighting; Eclairage; luminance; visibilite; adaptabilite
AbstractTwo major factors determine the visibility of common objects: the luminance contrast of the object detail with respect to its immediate background and the adaptation level of the visual system. CIE Publication No. 19 chooses the term task luminance to characterize an observer's state of adaptation and then uses this factor to describe a task in connection with all operations carried out in the visual performance framework of methods. The imprecision and poor understanding of this parameter severely restrict the accuracy of the visual performance methodology in lighting energy conservation and design. Experimental procedures are proposed for accurate measurement of background luminance for typical office and school tasks.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-818
NRC number17137
4368
NPARC number20359121
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Record identifierfa317d05-a1b6-431f-b50a-445dfba1bd35
Record created2012-07-20
Record modified2016-05-09
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