A street light, lamppost, street lamp, light standard, or lamp standard is a raised source of light on the edge of a road or walkway, which is turned on or lit at a certain time every night. Modern lamps may also have light-sensitive photocells to turn them on at dusk, off at dawn, or activate automatically in dark weather. In older lighting this function would have been performed with the aid of a solar dial. It is not uncommon for street lights to be on posts which have wires strung between them, such as on telephone poles or utility poles.
Read more about Street Light: History, Measurement, Advantages, Disadvantages, Purpose, Street Light Control Systems, Maintenance, Main Manufacturers
Famous quotes containing the words street and/or light:
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