Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 283
mj). There was also another serious practical drawback to the existing method ofspecification. Specifications fixed limitsfor three quantities—candles, watts, andwatts per candle. The candles and thewatts were measured in practice, and thelamps outside the limits were rejected.It was usually,… … Watt.,. I III. ILLUMINATING ENGINEEF de» 1918) 27 1 Instead of only accepting lamps whichfall within the vertically shaded area, alllamp3 would be passed which fall withintht^ rectangle, and obviously some verylow efficiency lamps and Bome whichtoo high would then be passed. In view of the various…
Lighting
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