Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 85
fall below 025 foot-candle,and if the general surroundings arebright, it should be higher than this. Skylights and Roof Cleaning. The architect often seems to comein for criticism at the meetings of thisSociety, and he certainly cannot be letoff when the present subject is underconsideration. Why… … Fig. 9.—Showing methods of lighting scales, checking desks, etc., in parcel- offices. variation in daylight between tin-extremes of bright sunshine and a dullcloudy sky. Personally I have nevergone further than arranging for twosystems of illumination, one set of lampsbeing in use during daylight…
Lighting
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