The importance of overvoltage protection Lighting in public areas, especially street lighting, accounts for a large proportion of public service expenditure in a city. This includes not only the electricity cost required by the street lamp work, but also the repair and replacement cost of the street lamp. Compared with traditional light sources, LED light sources have various advantages, especially long life, low protection frequency, and controllable output light shape, which make them very suitable for use in the outdoor environment, such as LED street lamps. Especially now, with the development of LED technology and the sophistication of related driver technology, the use of LED lamps is becoming more and more extensive and accepted by the public.

However, the natural environment in the field is often harsh, and as far as the indoor environment is concerned, there is another factor that must be considered in the field application, namely, the unstable voltage.

Traditional street lamps, such as high-pressure sodium lamps, require thousands of volts for their own work, so they are not too sensitive to high voltage. However, LED components themselves and their supporting drivers are low-voltage devices, which are very simply affected by sudden high voltage. LED street lamps shall have outstanding surge protection equipment, which can withstand at least 10000V high voltage (between live line/neutral line and ground) and 6000V high voltage (between front line and neutral line).