1.Light sensor will automatically turn on once light insensity is less than 4Lux,and waltage will reduce to half after 6 hours,and turn off after 10 hours. 2.Protect rechargeable batteries in case of charge excessively,recharge excessively and loading current excessively. 3.Modulate and track max power of solar panel by pulse modulation (Quality warranty 2 years.)

Lamp holder: The pressure cast-aluminium moulding with power coating, fastenings: stainless steel inner-hexagonal-bolt  fastenings, lamp-chimney: PC chimney with high transparent and high temperature resistance , the American Pu sharp chip, highly effective energy conservation in 80%  , the life span:50000 hours, 10-12 years (quality warranty:3years)

The Lithium Iron Phosphate Battery,without maintenance. (life-span for 5 years, quality warranty : 3 years) this battery is non-toxic without any heavy-metal and  rare metals,

Light pole: Low-carbon-high-frequency-welded steel pipe, and  stainless steel solid piece for pile foundation(pole diameter: Base diameter:32CM, the top diameter: 8CM) the cell box are made of galvanized iron sheet with the thickness of 1.5MM . Light pole are made of  Q235-A steel products with powder coating after hot- galvanizing,the thickness is 3MM. (quality warranty: over 15 years)