... 4. Even illumination intensity XINXU Solar Power Street LampProducts Apply To Municipal Engineering,Street lamp,Square,Garden,ect.Quality warranty ... lead-acid battery, 4.Light source: 9W LED lamp5.Control system: Solar light special micro computer intelligent controller6.Working temperature ... : More than 7 days9.Solar panel life span: 25 years10.LED lamps life span: 50,000 Hrs solar power street lamp