Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 254
fies practical experience. Calculations for some other rooms inthe same building lighted in the sameway, but having dark walls, also gavefair results by this method ; but onewould probably have got still closer inthese cases by regarding the ceiling asan illuminated rectangle instead of aninfinite… … Plan of Library illuminated by a 100-watt lamp in indirect bowl.Illumination, measured in a horizontal plane,3 ft. 3 in. from floor :— Under lamp, 17 ft.-candles.At A 135 ft.-candles. At B 15 ft.-candles. 240 THE ILLUMINATING ENGINEER (may) based upon experience are made. In theexample shown a room…
Lighting
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