In the past, traditional street lamps were primarily HID lamps and mercury lamps. However, due to disadvantages such as lumen decay, high power consumption and short lifespan, traditional light sources are no longer in line with the global energy-saving trend. LED quickly made its way into street lighting due to several factors, including carbon emission reduction policies enforced worldwide and improved luminous efficacy LED light sources (a total luminous efficacy of over 100–130 Lm/W and an application luminous efficacy of over 50 Lm/W), as commercial opportunities presented themselves.