Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 75
n which inquiries are frequently madein connection with searchlights. Cus-tomers often ask how far a searchlightwill enable a man to pick up or observe an column in the table gives data on thisinteresting question. The candle-power of the headlight isfrequently asked for. This may bethe maximum… … • Furnished with Polished Aluminium or Silver-plated Brass Reflector. obstacle. The answer to this questiondepends on a great many conditions suchas the contrast between the object and thebackground. For example, a mandressed in white can be seen against a darkbackground 1 -7 times as far as one…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
