Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 45
re white 32 THE TLLUMTNATING ENGINEER. putty coat plaster, and tlie floor of verylight maple. In a paper reail l)y Lansingli andRolph (Illuminating Engineering Societyof U.S.A., rroceeflings, 1908) an eflfi-eieney of 7!) per cent was stated foriiidiiect ligliting in a room with purew hite ceiling,… … Fio. 17.—Indirect Lighting in vestibule of LiverpoolTlieatre. which the indirect system has displaced.These comparisons, covering all classesof installations in both large and smaUshops, office buildings, halls, theatres,&c., are most interesting evidences ofthe real gains in efficiency secured…
Lighting
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