Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 129
e). Installation V. Decoration I. Fittings.—Twelve semi-indirect 14 in.thick opal bowls with 150 watt lamps,arranged as shown in Fig. 8. The average illumination was foundto be 4*3 foot-candles for an expenditureof 1,920 watts. The lighting appearedfairly uniform though the middle of the 4 <…
Lighting
Internet Archive · University of Toronto Libraries · Public Domain Mark 1.0. Free to use for anything.
