... ; 4,System life : > 20 years *Solar Street light Features: 1,high efficient solar panel,monocrystalline silicon.with converstion rate more ... 17.2%;warrry of 5 years; 2,Battery:free maintainence rechargeable ... height, hot dip galvanised plastic spraying. 7,Lamps and lanterns: computer design,die casting aluminum ,plastic spraying, 8, ...