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Original Articles

Coefficients of Utilization for Illuminance and Exitance in Long, Narrow Spaces

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Pages 4-13 | Published online: 20 Sep 2013

References

  • “Lighting Calculations”, Chapt. 9, IES Lighting Handbook — 1981 Reference Volume, J. Kaufman, editor, pp. 9–5 through 9–39.
  • Levin R., “Cavities, Coefficients, and Direct Ratios”, Journal of the IES, Through usage, an infinite room commonly implies a large space where both length and width are large with respect to height, i.e., RCR O. A new name should be selected to imply a long narrow space where a single central row of luminaires is appropriate.

References

  • R.E. Levin, “Cavities, Coefficients, & Direct Ratios,” JIES 11:178, April 1982.
  • P.F. O'Brien, “Numerical Analysis for Lighting Design,” Ilium. Engr., 60:169, April 1965.
  • Calculation Procedures Committee of the IES, “Recommended Procedure for Calculating Coefficients of Utilization, Wall Exitance Coefficients, & Ceiling Cavity Exitance Coefficients,” JIES, 12:3, October 1982.

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