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A sky lantern (traditional Chinese: 天燈; simplified Chinese: 天灯; pinyin: tiāndēng), also known as Kǒngmíng lantern (traditional Chinese: 孔明燈; simplified Chinese: 孔明灯), or Chinese lantern, is a small balloon made of paper, with an opening at the bottom where a small fire is suspended.
High-pressure sodium lamps produced a distinct "yellow/orangeish light", [14] brighter than mercury vapor light, which has been described as a "harsh metallic blue" in hue. [15] During the OPEC oil embargo , Mayor Richard J. Daley announced a plan to make Chicago "the first large U.S. city to have sodium vapor lamps on all residential streets ...
The Cape Florida Light is a lighthouse on Cape Florida at the south end of Key Biscayne in Miami-Dade County, Florida. [5] Constructed in 1825, it guided mariners off the Florida Reef , which starts near Key Biscayne and extends southward a few miles offshore of the Florida Keys . [ 6 ]
Nick Holonyak Jr. (/ h ʌ l ɒ n j æ k / huh-LON-yak; November 3, 1928 – September 18, 2022) was an American engineer and educator.He is noted particularly for his 1962 invention and first demonstration of a semiconductor laser diode that emitted visible light.
In English, the term most commonly refers to a specific type of simple paper lantern made by placing a votive candle in some sand inside a paper bag. [1] Also known as a farolito [ nb 1 ] , it is a traditional Christmas decoration in the Southwestern United States , particularly New Mexico , where it is a cultural hallmark of the Pueblos and ...
The original lamp burned kerosene; in 1909 it was replaced with an incandescent oil vapor lamp. In 1924 a generator was installed to provide electricity in the keepers' dwellings and to pump water, replacing an old windmill pump. The lighthouse beacon was electrified in 1933 with a 500-watt lamp.
1962 Nick Holonyak Jr. develops the first practical visible-spectrum (red) light-emitting diode. 1963 Kurt Schmidt invents the first high pressure sodium-vapor lamp. [19] 1972 M. George Craford invents the first yellow light-emitting diode. 1972 Herbert Paul Maruska and Jacques Pankove create the first violet light-emitting diode.
The new tower for the Key West Light was completed in 1848. It was 50 feet (15 m) tall with 13 lamps in 21-inch (530 mm) reflectors, and stood on ground about 15 feet (4.6 m) above sea level. In 1858 the light received a third-order Fresnel lens. In 1873 the lantern was replaced (it had been damaged by a hurricane in 1866), adding three feet to ...