... life and environment protection 3.low price led undergound light,led light,in-ground lightMaterial: stainless steel and tempered glass ... Non-maintaining lead-Acid battery,life span=5-8yearsController: Micro-computer intelligence control, defend to excessively refresh,excessively ... and automatically open according to the bright degree,pass light and time control,life span=5yearsWorking temperature: -20 ...