High thermal conductivity die-casting aluminum alloy. Unique Heat sink design make sure the LED Street LightsMoon series can work steady in +40 to -70 degrees. Scientific and reasonable second light distribution design with best optical distribution and make the lamps output efficiency above 95%. 0.95 High power factor constant current driver, resist Lightning stroke and high input voltage. Quake-proof, Explosion proof, Dust proof and Waterproof etc.