Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 154
mp as serving simply to produce thedesired luminous effect over the lowerportion of the bowl, without apparentlycontribviting any very appreciable directlighting element to the illumination ;in this respect the sjstem is somewhatdifferent from semi-indirect methods inwhich the direct downward… … Fig. 2.—Semi-indirect lighting in the General Office of Sir W. G. Armstrong Whitworth& Co., Ltd., Newcastle-on-Tyne.
Lighting
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