... polycrystalline, Class A cell, conversion efficiency: 16~17%Light Source40W, individual superbright LEDsPole6m, made of galvanized steelController12/24V ... no risk of electric shockLED light source without flickering and higher brightness than sodium lights.Product Features:Superbright LED ... Q235 steel, hot-galvanizing & powder spray treatment.Over 20 years life, resistance of sunny, rainy, windy and ...