Light, photometry and illumination : a thoroughly rev. ed. of ''Electrical illuminating engineering'' (1912)
Barrows, William Edward, 1878-1960 · New York ; London : McGraw-Hill Book Co. · leaf 321
ed on account of the seriousglare effect which would result from the application of suchdistributions to actual practice. The curve ill = 4, however,comes within the limitations imposed by the curve of zero glareeffect, providing the scale of the il/ = 4 curve does not exceedthat amount which would… … Fig. 10 20 30 4U 50 60 Angle 187.—Curves for zero glare for various mounting heights. Reference to Fig. 187 shows that for all practical purposes,60 degrees is an absolute limit for maximum candle-power ifserious glare effect is to be avoided. It will also be observedthat an increase in mounting…
Light · Photometry · Electric lighting
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