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Some Facts & inventions

Thomas Edison's first successful light bulb model, used in public demonstration at Menlo Park, December 1879 In 1878 Edison began working on a system of electrical illumination, something he hoped could compete with gas and oil based lighting.[46] He began by tackling the problem of creating a long lasting incandescent lamp, something that would be needed for indoor use. Many earlier inventors had previously devised incandescent lamps, including Alessandro Volta's demonstration of a glowing wire in 1800 and inventions by Henry Woodward and Mathew Evans. Others who developed early and commercially impractical incandescent electric lamps included Humphry Davy, James Bowman Lindsay, Moses G. Farmer,[47] William E. Sawyer, Joseph Swan and Heinrich Göbel. Some of these early bulbs had such flaws as an extremely short life, high expense to produce, and high electric current drawn, making them difficult to apply on a large scale commercially.[48]:217–218 Edison realized that in order to keep the thickness of the copper wire needed to connect a series of electric lights to an economically manageable size he would have to come up with a lamp that would draw a low amount of current. This meant the lamp would have to have a high resistance and run at a low voltage (around 110 volts).[49] After many experiments, first with carbon filaments and then with platinum and other metals, in the end Edison returned to a carbon filament.[50] The first successful test was on October 22, 1879;[48]:186 it lasted 13.5 hours.[51] Edison continued to improve this design and by November 4, 1879, filed for U.S. patent 223,898 (granted on January 27, 1880) for an electric lamp using "a carbon filament or strip coiled and connected to platina contact wires".[52] This was the first commercially practical incandescent light.[53] 900 BC Muhammad ibn Zakariya Razi, a Persian scholar, invented the kerosene lamp.
1780 Aimé Argand, a Swiss physicist and chemist greatly improved oil lamp efficiency and performance with improved oils and the use of glass chimneys to draft the flame.
1792 William Murdoch, Scotland, began experimenting with gas lighting and probably produced the first gas light in this year.
1841 Arc-lighting used as experimental public lighting in Paris.
1854 Heinrich Göbel, Germany, invented an incandescent lamp by passing an electric current through a carbonized bamboo filament that was placed inside of a glass bulb.
1867 A. E. Becquerel, France, coated electric discharge tubes with luminescent materials, a process that was further developed in later fluorescent lamps.
1875 Henry Woodward, Canada, patented an electric light bulb with carbon filament.
1876 Pavel Yablochkov, Russia, invented the Yablochkov candle, the first practical carbon arc lamp, for public street lighting in Paris.
1878 Sir Joseph Wilson Swan, England, patented his incandescent lamp.
1879 Thomas Edison, USA, patented the carbon-thread incandescent lamp.
1893 Nikola Tesla, USA, used cordless low pressure gas discharge lamps, powered by a high frequency electric field, to light his laboratory. He displayed fluorescent lamps and neon lamps at the World Columbian Exposition.
1901 Peter Cooper Hewitt, USA, demonstrated the mercury-vapor lamp.
One of Peter Cooper Hewitt's early Mercury Vapor Lamp
A free-standing Cooper-Hewitt lamp, fitted with cabron-filament lamps in a series to act as a ballast. (Courtesy Philips)
1905 Albert Munsell, USA, developed a practical system of color notation; Albert Einstein explained the quantum energy states of matter and light.
A modern example of Georges Claude's Neon lamp. ABOVE A modern neon lamp. 1909 William Coolidge, USA, developed ductile tungsten wire, making the "modern" incandescent lamp possible.
1911 Georges Claude developed the neon lamp.
1926 Edmund Germer, Germany, patented the fluorescent lamp.
1930s Richard Kelly, USA, became a pioneer in the foundation of the lighting design profession through his work on the Kimball Art museum and the Seagram Building.
1946 H. Richard Blackwell, USA, developed a system for specifying illuminance criteria, adopted by IESNA in 1958.
1947 Robert McKinley, USA, edited first edition of the "IESNA Handbook".
1950s Stanley McCandless, USA, authored "A Method of Lighting the Stage", the pioneering stage lighting reference.
An example of modern stage lighting An example of a modern stage light. (Courtesy Philips) Nick Holonyak Jr. in his workshop. Photo Credit: Department of Physics, University of Illinois at Urbana-Champaign, courtesy of AIP Emilio Segrè Visual Archives. ABOVE Nick Holonyak Jr. in his workshop. Photo Credit: Department of Physics, University of Illinois at Urbana-Champaign, courtesy of AIP Emilio Segrè Visual Archives.
1962 Nick Holonyak Jr., USA, developed the first practical visible-spectrum light-emitting diode.
1970 John Flynn, USA, authored "Architectural Lighting Graphics", a pioneering reference for the design of lighting.
1975 The International Association of Lighting Designers was established to provide education and training for professional lighting designers.
1976 James Nuckolls, USA, authored "Interior Lighting for Environmental Designers".
1978 Roscolux Color Filters were introduced providing more than 140 color options for Stage and Studio lighting.
Roscolux Stage Lighting
1981 Introduction of compact fluorescent lamps.
1989 New generation of reliable electronic ballasts for fluorescent lamps begins the large scale retrofit of older technology T12 fixtures to new T8 technology.
1991 Introduction of the first induction (electrodeless) fluorescent lamp.
1992 Signing of the federal Energy Policy Act into law gives added impetus for use of energy saving lighting.
1995 Introduction of electronic T5 fluorescent systems and associated new luminaire designs.
1999 New breakthroughs in LED technology improve efficacy and color (white LEDs). First talk of LEDs potentially replacing traditional general lighting sources.

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