Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 48
Fig. 13.—Board Room. Direct General Lighting. … Fig. 14.—Insurance Office Staircase. Semi-indirect Lighting. 38 THE ILLUMINATING ENGINEER (feb. 1919) Half-frosted 60-watt lamps are recom-mended, and an intensity of illuminationof at least 8 foot-candles should beavailable. Fig. 16 illustrates an efficient devicethat has been used with success is…
Lighting
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