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[1] [2] They include the sodium-vapor lamp that is the gas-discharge lamp in street lighting. [3] [4] [1] [2] In operation, some of the electrons are forced to leave the atoms of the gas near the anode by the electric field applied between the two electrodes, leaving these atoms positively ionized.
Many people dislike the ambiance produced by LEDs with color temperatures of 4000K or higher. 2700K and 3000K LEDs are mostly used for indoor lighting. [7] [8] The initial cost of LED street lighting is high and as a consequence it takes several years for the savings on energy to pay for that.
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.
Gas lamps gradually started replacing oil street lamps in the United States, beginning in the first quarter of the 19th century. [3] The first street in the world to be illuminated by gaslight was Pall Mall in London, starting in 1807. [1] [5] The first US city to use gas street lights was Baltimore, starting in 1817. [4]
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 ...
Tancheon Stadium under canopy installation in 2009. In 2009, Seongnam FC moved their home matches to Seongnam Sports Complex as the canopy installation works commenced. [5] The installation was completed in 2010. The first match held since the installation was Seongnam FC's 2010 AFC Champions League game against Kawasaki Frontale on 23 February ...