Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 590
. units at a height of25 ft., and an average illumination of1-6 foot-candles was measured on (hefloor. ... Here again the photograph gives anexcellcni impression of the powerful welldiffused illumination provided, which is essent tal in engineering work of t his clai s, The Trus-Con Laboratories… … Fig. 2. General lighting On the right-hand side of this main bay,machines are closely packed ; on the leftare the fitters benches, smithy, &c Onthe fitters bench there is an average of8 foot-candles obtained from 300 C.p.units placed 4 ft. above the workingsurface. Various other measurements…
Lighting
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