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Limelight (also known as Drummond light or calcium light) [1] is a non-electric type of stage lighting that was once used in theatres and music halls. An intense illumination is created when a flame fed by oxygen and hydrogen is directed at a cylinder of quicklime ( calcium oxide ), [ 2 ] due to a combination of incandescence and ...
Illuminance diagram with units and terminology. In photometry, illuminance is the total luminous flux incident on a surface, per unit area. [1] It is a measure of how much the incident light illuminates the surface, wavelength-weighted by the luminosity function to correlate with human brightness perception. [2]
In 1916, Leviton moved its headquarters to Williamsburg, Brooklyn, [5] and in 1922 Leviton moved to Greenpoint, Brooklyn. [2] The company first began manufacturing wall outlets and switches in the 1920s. [3] In 1936, Leviton built a new manufacturing plant in Greenpoint that allowed the company to begin making pull chains. [3]
Aerolux Light Corporation was a manufacturer of artful gas-discharge light bulbs from the 1930s through the 1970s. [1] Aerolux made these bulbs in a factory in New York City . US Patents dating back to the 1930s describe the design and construction of these bulbs.
Colors in fireworks are usually generated by pyrotechnic stars—usually just called stars—which produce intense light when ignited. Stars contain four basic types of ingredients. A fuel; An oxidizer—a compound that combines with the fuel to produce intense heat; Color-producing salts (when the fuel itself is not the colorant)
The energy consumption can be 70% less than that of a standard incandescent light bulb. Claimed lifetime can be as long as 10,000 hours which is more than ten times that of a standard incandescent light bulb. [7] Unlike fluorescent lamps, which produce light through the electrical excitation of mercury vapor, ESL lamps do not use mercury. [8]
To underscore the strange spin on work-life balance in the new Apple TV Plus series “Severance,” cinematographer Jessica Lee Gagné worked closely with production designer Jeremy Hindle on a ...
Sonoluminescence is the emission of light from imploding bubbles in a liquid when excited by sound. Sonoluminescence was first discovered in 1934 at the University of Cologne . It occurs when a sound wave of sufficient intensity induces a gaseous cavity within a liquid to collapse quickly, emitting a burst of light.