... life span,energy saving solar light with high powerHeight: 6~12M, galvanized cone-shaped mast with coating finish on the surface ... Acid battery,life span=5-8yearsController: Micro-computer intelligence control, defend to excessively refresh,excessively turn on electricity, ... automatically open according to the bright degree,pass light and time control,life span=5yearsWorking temperature: -20°c----55 ...