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. When urban 展开

Today, street lighting commonly uses high-intensity discharge lamps. Low-pressure sodium (LPS) lamps became commonplace after World War II for their low power consumption … 展开

Major advantages of street lighting include prevention of automobile accidents and increase in safety. Studies have shown that darkness results in numerous crashes and fatalities, especially … 展开

The major criticisms of street lighting are that it can actually cause accidents if misused , and cause light pollution.
Health and safety
There are three optical … 展开

Preindustrial era
Early lamps were used in the Ancient Greek and Ancient Roman civilizations, where light primarily served the purpose of security, to … 展开

Two very similar measurement systems were created to bridge the scotopic and photopic luminous efficiency functions, creating a Unified System of Photometry. These mesopic visual performance models are conducted in laboratory conditions in which the … 展开

A number of street light control systems have been developed to control and reduce energy consumption of a town's public lighting system. These range from controlling a circuit of … 展开