Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 351
cy,demands careful attention to the type of 4,800 watts, which is equivalent to ratherless than half a watt per square foot offloor area. The illumination on thelighting plane is given as 2.2 foot-candles—quite a high value for this consump-tion of electricity—and is said to beextremely even. For…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
