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 314
--/ / /^ 5 10 15 20 25 30 35 40 45 50 55Degrees 60 65 Fig. ISO.—Candle-power curves, d//i, = 8. a form of curve practical for actual attainment; but the still veiyhigh candle-power maximum is prohibited by the limitationsimposed by avoidance of glare effect. Figs. 181 and 182 give the required… … 60 65 Fig. 181.—Candle-power curves, d/h = 6. 5 10 15 20 25 30 35 40 45 50 55Degrees Fig. 183 the full-line curve shows the actual distribution of onemake of arc lamp to-day on the market, the curve being oneobtained by test by the Electrical Testing Laboratories. Thedotted curve is the ideal curve…
Light · Photometry · Electric lighting
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