3.5M Pole 15W*2PCS LED Solar Garden Light Design base on 5.0Kwh solar radiation, for 12hurs/night lighting time, back up 3rainy days. System Working Condition Lighting time: 11-12 Hrs/night; Back up 3-4 continuous rainy days. Solar Panel: Lifespan:20-25 years 65W for 12V Lighting, SilliconType Crystalline Silicon. High Efficiency. Solar Battery Lifespan:5-8 years 65Ah/12V, Sealed Type, Gelled. Deep cycle. Maintenance Free. Intelligent Solar Controller Lifespan:5-10 years 10A/12V, Automatic Light and Time Control Over-charging/discharging Protection. Light source: High Power LED Lifespan: More than 50000-100000Hrs 15W*2PCs LED, White Color, Epistar chip, 840LM+840LM, 6500K, IP65. Lamp Housing: Lifespan: More than 20 years Die-casted Aluminum, IP65, High transmittance & density toughened glass; Pole: Lifespan: More than 20 years 3.5M Height, Steel, Hot-Dip Galvanized. Arm, Bracket, Flange, Fittings, Cable, Etc Warranty 3 years for whole system