... environmental and energy-saving 3 certificate: CE,ISO9001:2000 Solar Lawn LightSolar lawn widely used in spots parks, ... .4m /sTemperature: -30 °c ~ +55 °c Panels single / polycrystalline silicon solar panels with high conversion efficiency, life ≥ 25 years Batteries ... : solar energy for colloidal silicon energy, lead-acid batteries, life ...