Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 597
ors are unsatisfactory in this respect. It is also desirable that the shade or globe should soften and diffuse thelight ; it should appear evenly illuminated all over. The adjacent illustrationshows how many lightly ground glassglobes do not diffuse the light sufficiently ;prismatic and opal glass… … In private house lighting, where orna-mental effect is considered and the questionof economy is often not very vital, silkshades are often used. In this case thedanger of getting too little light must beguarded against. It is a good plan to linecoloured silk shades with white material whichreflects…
Lighting
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