Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 219
e about The mean value calculated from the results of Table \ III. is approximately ?™9= 3-7 foot candles.575 204 THE ILLUMINATING ENGINEER (april) Table IX.Detailed Illumination Values for Position A. Fig. 14. Lamp. Total dist. Total dist. Cos. e 9 I. Nor. ilium. I. 715 26-715 0-262 74° 50 87… … na is polup curve or lAnrnno rirrma uato in tCMOOL cms J »oon in fio I* and as the observed values tended to beless t ban t be calculated valui b, t beutilisation factor baa a maximum value of 3762 60 The low value is largely due t<> lossthrough windows of relatively grealarea. (6 Local…
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