Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 406
havea broad throw of light lengthwise tothe window, as it tends to producegood diffusion. A large number of small light unitsis preferable to a small number oflarge units. The cost of installationof the former is large but the lattersystem is only suitable for horizontalarticles, and has the… … Fig. 7.—Plan of converging windows showingposition of lighting units. 1-5 are polar curves suitable for dif-ferent sizes of wndow. Planes A andB represent two possible extremes.Large objects such as dress forms maybe set up vertically in a \Aindow, butin general the plane of dress will besomewhere…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
