Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 464
UMINATING ENGINEER. 435 Improved Efficiency of High Candle-Power Tungsten Lamps. By a. Libesney.* Paper presented at the meeting of the Vereiuiguni; der Elektrioitiitswerke in Magdeburg,June 10th to 21st, 1011. In an intere.sting communication onthis subject, HeiT A. Libesney reviewedthe progress… … 100 -IW olil 4110 50O 600 700 800 9:in HWO 1100 TJOO HOURS.Fig. 1.—Showing life tests of lauijis run at various efficiencies. Figures attached to each curveindicate watts per H.K. Efforts are continually being madeto reduce the specific consumptionof these lamps below the usual figureof Il watts…
Lighting
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