Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 209
ll in.for 300 to 1,000 watt lamps of the gas- filled type. The general nature of thefitting will be understood from Fig. 1,while Fig. 2 shows the distribution of IS. 165 180 165 ISO- … Kit.. 2.—Curve showing intensive distributiongiven by h-umfa unit. light secured. The efficiency of the unitis stated to be comparatively high, and itis claimed that there are no upturnedsurfaces to accumulate the dust. WANTED—A young graduate electricalengineer, who has had experience…
Lighting
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