Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 178
Fig. 6.—Ideal curves, showing same total lightfluxin various forms of light distribution.(Note the apparent large increase in lowercircle as compared with the other curves.) Fig. 8.—Variation in apparent candle-powervalues of a 300-watt lamp through use ofdifferent reflectors.
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
