This Note proposes two methods of comparison of measured and calculated illuminance data. The first is an improved version of the percentage difference method; the second uses statistical analysis of both sets of data from which a correlation coefficient is calculated. Data sets relate to a laboratory and an office with modem ceiling-mounted luminaires; both empty and obstructed cases are considered.
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References
1.
The calculation and use of utilisation factors Technical Memoranda 5 (London: Chartered Institution of Building Services Engineers) (1980)
Chari N.S. and Chakraborky S.Discrepancies in measurement of light in laboratory and fieldProc. 6th Lux Europa, Budapest pp 75-78 (1989)
4.
Slater A.I.Non-uniform lighting design: A comparison of computer calculated lighting distribution and measurements Proc. CIBSE Nat. Lighting Conf, Cambridge pp 144-156 (1988)
5.
Egger W.Comparison of computed and measured illuminances and CRFs ProcCIBSE Nat. Lighting Conf, Cambridge pp 39-64 (1988)
6.
Siegel S.Non-parametric stanstics for the behavioral sciences International student edition (New York: McGraw-Hill) (1956)
7.
Code for Interior Lighting pp 153-155 (London: Chartered Institution of Building Services Engineers) ( 1984)
8.
Carter D.J. and McEwan I.Obstructed spaces in interior lighting design: computer analysisLighting Res. Technol. 20(1) 21-28 (1988)
