Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 315
at direct sunlight is from 20 to 70 times asinjurious as diffused daylight. Hence it issuggested that rooms containing unique objects ofmore or less fugitive colours might be illuminatedsolely by electric light. Electric lamps can now be obtained whichproduce a satisfactory daylight effect.… … THIS is the latest type of Holophane Scientific Unit.It is made in two sizes, and is called the ReflectorRefractor. A very efficient unit, and speciallysuitable for the lighting of OFFICES, SCHOOLS,SHOPS and INDUSTRIAL ESTABLISHMENTS.The services of our Illuminating Engineering Departmentin the…
Lighting
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