Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 34
overed AVlth an distribution from iii.iireot fitting. Solid line elastic enamel to protect and sliows comet distribution from properly located preserve it. The blanks are f>*-H^H>H-i .S1^lo?ow3 t^^^^^^ ^. 1 r « , 1 tiou With the httiug nxed lOO low and too ingii given a number of flutes and… … 22 THE ILLUMINATI>^G ENGINEER. corrugations in order to preventstriations. These reflectors as maybe expected are very efficient. Theaccompanying polar curves (see Figs.4 and 5) show tlie distribution andalso disclose the fact that, of 734lumens generated by the lamp, 612are yielded fron the…
Lighting
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