... many protection functions, such as, Anti-Over-charge, Over-discharge, with Light Sensor & Timer, including the Digital LED Driver to drive the ... brass wire inside, especially used for Guolu solar street lightWorking Temperature-30°C~~50°CReliabilityEvery night working, 365 days in a ... time In the night when the darks approaching, the LIGHT SENSOR of the CONTROLLER will turn on the LED lamp automatically ...