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Light and lighting (1908)
Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 35
1 Cofulaal8 XCciKUtPc wcr National X-Ray Reflector Co.EaiiDceriai Dcparlaeal Fig. 14.—Table of Values, shov.ing how Lumens are employed to express accu-rately the light flux delivered in each section or angular zone of the light distribu-tion curve of lamp and reflector (Fig. 13). 24 THE… … s 0 (3 30 ? < Ciadle PowM } C4Bdle Power LiiDp (sd ReflKtM Bare Uap | LimpCiRefl Lunp Unp«iRJ| B..CLamp Zone . . . 0-60- 0-90- 0-180- 0-60- 0-90- 0-180- ^ 0- m ~W Lumrni . . 66/Z 7-*^ 7-^5- 97/ ?r 5 166 95 Rrflecor ^^^01^ ^^j/fl^ older ^^ Form^H^ ^ 15- Z30 103* i, lb 26-* 115-123- , Cleat-Mazda…Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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