Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 37
Lighting. 1. Economy.—The economy of dif-fused hghting is considerably reducedby absorption of the diffusing medium—^the bowl or sphere. This reduction isconsiderably larger than is generallyappreciated, and may easily reach50 per cent, and with good diffusionit will be at least 20 per cent in… … KiG. ••.—Example of semi-indirect lighting witli ornamental alba glass bowl fitting. 4. Evenness of Illumination.—^Whilevery good in an unoccupied room,difficulties arise with tlie presence ofobjects and people, so that here—as intlie case of shadows—it is necessary toemploy a large number of…
Lighting
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