The market for street and roadway lighting is undergoing a rapid transition from conventional technologies, such as high pressure sodium, to light-emitting diode (LED) light sources. High pressure sodium remains the biggest seller today, but some companies that sell them are already planning to discontinue their non-LED product lines. According to a recent report from Navigant Research, the installed base of LEDs in street lighting worldwide is expected to grow from 13.2 million in 2014 to more than 116 million in 2023.
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