Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 230
ntypical of their kind, and were selectedfor that reason from amongst a largenumber available. Although their dis-cussion has not elicited anything new ororiginal I hope that it may have helpedto remove any doubt remaining of theproposition that light for illuminationpurposes is capable of… … nearly two years after the lamps wereinstalled, with practically all themachinery and belting in position andrunning, the mean horizontal illumina-tion was found to be 26 foot-candles,and the minimum, in direct view of thelamps, was 2*4 foot-candles. This meanvalue is well above that demanded,…
Lighting
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