... Over-charging/discharging Protection Reverse-connection Protection Switch on Automatically with Light Sensor. LED LAMP Lifespan: >100000Hrs 30W LED, White Color,120LM ... : More than 20 years 6M Height, Steel, Hot-Dip Galvanized. With Arm, Bracket, Flange, Fittings, Cable, Etc Plastic Coated, Rust Proof ...