Three kinds of light used; white arc lamps, extensively behind banners
and shields to flood facades of outer walls and Court of Four Seasons;
warmer light of Mazda lamps in clear and colored globes; and
searchlights concealed on tops of buildings trained on towers and on
high groups of sculpture.
Lighting scheme and scope completed long before buildings were up; made
possible by advance in illuminating engineering, developed under name of
science of lighting and art of illumination.
Chief of Department of Illumination, Walter D'Arcy Ryan, of the General
Electric Company, Schenectady, New York; field assistant, A. F.
Dickerson.
Ornamental details of lighting standards and fixtures, designed by J. W.
Gosling; designs made at Illuminating Engineering Laboratories,
Schenectady.
Keynote of lighting scheme - life and gaiety, without garishness.
Lighting kept subordinate to architecture; walks shaded to throw
emphasis on brilliantly lighted facades and to bring out architecture,
landscape and flowers. Same lighting principle used throughout; but
effect in different courts radically different.
Area of surface illuminated, 8,000,000 square feet; 2,000,000 of wall
surface, and 6,000,000 of ground surface.
Number of searchlights used: 373 arc searchlights, in diameter from 13
to 36 inches; 450 small searchlights, called the "Mosquito Fleet"; 250
incandescent projectors for flag lighting.