Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 90
f a factory or workshop. angle between the line from the eye toan unshaded part of the source and ahorizontal plane is not less than 20°, orin the case of any person employed at adistance of 6 ft. or less from the sourcenot less than 30°. The application of this recommenda-tion would doubtless… … Fig. 4.—View of a Machine Room in an Iron Works at Croydon (95 ft. by 40 ft.), lighted byfour Keith (1,500 candlepower nominal) high-pressure gas lamps, arranged down centreof room at a height of 25 ft. Consumption : 120 cub. ft. of gas per hour. Thephotograph illustrates the advantage of mounting…
Lighting
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