Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 267
Fig. .3.—Light ■ ,ai. showing crystal tittings. Stsindards used forlocnl illumination. 238 THE ILLUMINATING ENGINEER. Moreover, il may be pointed outIhat the only result of experiments onartificial daylight has been to pro-duce a light which resembles daylightso far as the colours are concerned.… … Fig. 5.—Vlusic room, showing general illumina-tion with special lighting for organ. But, as in the case of all artificial illu-minants, the light emanates from asmall point. Two square mches of surfacewould be a large radiating surface, and,even when diffusers are employed. 2 to4 square feet would…
Lighting
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