... life : > 20 years *Solar Street light Features: 1,high efficient solar panel,monocrystalline silicon.with converstion rate more 17.2 ... 3 years;3,Led own high power efficiency and good heat dissipation performance; 4,Intelligent microcomputer controller 5,Ambient temperature: -50 ... capability, *The high illuminous efficiecny LED,with good heat dissipation performance. *Operate on 12 V DC,24V DC *Input ...