Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 26
Fig. 2.—Light distribution from 100 watt Fig. 4.—Light distribution from 300 watt Half-Standard Metal Filament Lamps. (Fila- watt Type Lamp. (Filament No. 6 inment No. 1 in Fig. 1.) Fig. 1.) … Fig. 3.—Light distribution from 100 wattFocusing Lamps. (Filament Xo. 4 inFig. 1.) Fig. 5.—Light distribution from 100 wattSpiralised Filament Lamps. (FilamentNo. 2. in Fig. 1.) 16 THE ILLUMINATING ENGINEER (jan. 1917) This form of measure would do fairly wellso long as lakes have a general…
Lighting
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