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1994 T5 lamps with cool tip are introduced to become the leading fluorescent lamps with up to 117 lm/W with good color rendering. These and almost all new fluorescent lamps are to be operated on electronic ballasts only. [5] 1994 The first commercial sulfur lamp is sold by Fusion Lighting.
1. 20 N. Wacker Drive, Civic Opera Building (1930–1942). In 1930, the 36th floor of the Civic Opera Building was renovated to realize the objectives of the Institute. The building was designed in 1929 by Graham, Anderson, Probst and White, and owned by Samuel Insull—a business magnate who also formed the Commonwealth Edison Company.
General Electric Building, New York (1940): 1931 building with Gothic crown creating a night-time effect of lack of solidity, relighted in 1940 to showcase fluorescent lighting, with red lights inside and blue outside the crown and a dimmer on a timer added for the existing white lights to produce color changes; spotlighting of architectural ...
(The exception was the largest lamp with 85 cm top shade, which used the 4:2:1 proportions). The first line of lamps were made available in five sizes. The lamps sizes in the system were given rational name scheme: 8/8, 6/6, 5/5, 4/4, and 3/3. The first number in the fraction represents the approximate diameter of the top shade in decimeters.
In 1919, Tilley High-Pressure Gas Company started using kerosene as a fuel for lamps. [13] In the 1920s, Tilley company got a contract to supply lamps to railways, and made domestic lamps. [12] During World War II, Armed Forces purchased quantities of lamps, thus many sailors, soldiers and airmen used a Tilley Lamp. [12]
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