Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 36
ed directlyfrom the lighting units through adiffusing medium, and partly indirectlyby reflection from the ceiling or othersurface. (See Fig. 9.) [d) Indirect Lighting, in which nolight is received directly on the illu-minating plane, but only indirectlythrough reflectors from a second surfaceor… … / Fig. 8.—Alba Glass siJieie fitting.Class A.—Direct lighting with reflectors is.as is well known, by far the mostgenerally used form of lighting. Class B.—-Direct lighting from dif-fusing globes or bowls comes next;the indirect and semi-indirect methodsbeing more recent, have not co:ncinto such…
Lighting
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