... °CCell efficency16%Solar panel TypeMono-silicon solar panelFrameAluminum alloyLight source35 W LED lamp, Super bright φ 9 LED, 24 VLife span: 20000 ... A. Low light decay LED from U.S >130 Lm /W ,10,000 hours light decay < 3%. B. LED beam angle ... lamp ground illumines equals to 250W sodium lamp (HPS), 30 W LED equals to 150W sodium light.3. Battery: 1.5 ...