Technical Data-System:3M 9w led panel light price Based On 5.0 kWh/m2/day 3M Pole Height 9W LED Lamp 11-12Hrs Lighting time/Night Back up 3-4 days Solar Panel, Lifespan:20-25 years 35W for 12V Lighting,17% Efficiency, Poly Crystalline ,Silicon Frame,Tempered Glass. Gel Battery, Lifespan:5-8 years 38Ah/12V,Sealed Type,Gelled.Deep cycle.Maintenance Free. Intelligent Solar Controller, Lifespan:5-8 years 5A/12V,Automatic Light and Time Control, Overcharging and discharging Protection, Reserve-connection Protection, Switch on Automatically with Light Sensor. Switch off after 11-12 hrs later Light Source:High Power LED, Lifespan:>100000Hrs 9W LED,White color, IP65,120Degree Angle, High power,High Brightness Lamp Housing, Lifesapn: More than 20 years Die-casted Aluminum,IP 65 High transmittance&density toughened glass. Pole, Lifespan:More than 20 years 3M Height,Steel Q235,Hot-Dip Galvanized. With Arm,Bracket,Flange,Fittings,cable,Etc Plastic Coated,Rust Proof.