Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 65
v<.^*^ • e « / . . . ........) / > ( , . . .........( Fig. 8.—General Lighting of Sewing MachineBenches. 200 watt Half-Watt lamps 10 feet abovefloor and 12--14 feet apart, give an illumina-tion of about 8 ft.-candles. Kefiectors appro-priate for spacing (intensive). Benches areusually about… … Fk; ;.—A system of Special Local Lighting uiSewing Machines. A 6-volt 55 c.p. glow lamp with small para-bolic reflector, placed about 6 inches fromthe needle, gives very strong illumination ofthe work, and the light is completelyscreened from the operator, tHE ILLUMINATING ENGINEER (feb. i{)16) 55
Lighting
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