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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. Similar lights may be found on a railway platform .
A solar street light in British Columbia, Canada. The solar panel is one of the most important parts of a solar street light, as the solar panel can convert solar energy into electricity that the lamps can use. There are two types of solar panels commonly used in solar street lights: monocrystalline and polycrystalline. The conversion rate of ...
Also exempt are several classes of specialty lights including appliance lamps, rough service bulbs, 3-way, colored lamps, stage lighting, plant lights, candelabra lights under 60 watts, outdoor post lights less than 100 watts, nightlights and shatter resistant bulbs.
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 ...
Landscape lighting or garden lighting refers to the use of outdoor illumination of private gardens and public landscapes; for the enhancement and purposes of safety, nighttime aesthetics, accessibility, security, recreation and sports, and social and event uses. Light pollution is exacerbated by excessive, misdirected, or obtrusive use of light.
A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure and high pressure.
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