Measurements of sky luminance, sky illuminance, and horizontal solar radiation

S. Treado, G. Gillette

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


This paper presents initial findings of a sky measurement program currently in progress at the National Bureau of Standards. Measurements are reported on sky luminance and illuminance and how they relate to horizontal solar radiation and sun position. Correlations are presented relating horizontal illuminance to horizontal solar radiation, and zenith luminance to solar altitude. These empirical models are particularly suitable for use in daylighting energy studies since they are based on existing solar data currently available on standard weather tapes.

Original languageEnglish (US)
Pages (from-to)130-135
Number of pages6
JournalJournal of the Illuminating Engineering Society
Issue number3
StatePublished - Apr 1983

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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