Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 474
as an open-access library ; (2)as a closed library. The lighting in thefirst case must be much more eftectivethan in the second, although this is notto say that the lighting in the secondmay be defective. A 50-watt lamp in ashade the size already described hung atthe level of the top of the books… … Fig. 2.—Lighting bookcases in a closed library. because they are a definite standardgiving certain universal results except forlocal variations, but other designs may be 468 THE ILLUMINATING p:NGiINEEK [ww] used giving brighter or softer lights;or contracted or extended reflection. In a closed…
Lighting
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