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A street light, light pole, lamp pole, lamppost, streetlamp, light standard, or lamp standard is a raised source of light on the edge of a road or path.
In New Orleans, arc lamps were used for street lighting starting in 1881. In 1882, the New Orleans Brush Lighting Company installed one hundred 2,000-candlepower arc lamps along five miles of wharf and riverfront; by 1885, New Orleans had 655 arc lights. [1] In Chicago, arc lamps were used in public street lighting starting in 1887. [1]
Street lights can be made intelligent by placing cameras or other sensors on them, which enables them to detect movement (e.g. Sensity's Light Sensory Network, GE's "Currents", Tvilight's CitySense). [5] [6] Additional technology enables the street lights to communicate with one another. Different companies have different variations to this ...
Sodium vapor street light Closeup after dark At end of life, high-pressure sodium (HPS) lamps exhibit a phenomenon known as cycling , caused by a loss of sodium in the arc. Sodium is a highly reactive element and is lost in a reaction with the aluminum oxide of the arc tube.
Solar street lights are raised light sources which are powered by solar panels generally mounted on the lighting structure or integrated into the pole itself. The solar panels charge a rechargeable battery, which powers a fluorescent or LED lamp during the night.
Street lighting in Stockholm; Street lighting in Washington, D.C. Street lights in New Zealand; U. Urban Light; V. Vermonica; Z. Zyga the Lamplighter Monument
A light tower In front of City Hall, Detroit, Michigan, about 1900. Detroit, Michigan, had a particularly extensive system of light towers, inaugurated in 1882. [6] 122 towers, 175 feet (53 m) tall and 1,000–1,200 feet (300–370 m) apart in downtown Detroit, were shorter, less powerful, and twice as far apart as typically found elsewhere. [7]
Solar street lights are stand-alone power systems, and have the advantage of savings on trenching, landscaping, and maintenance costs, as well as on the electric bills, despite their higher initial cost compared to conventional street lighting. They are designed with sufficiently large batteries to ensure operation for at least a week and even ...