Symmetrical and asymmetrical design makes the light come out with unique photometric distribution curve. As shown in test report, the light comes out evenly in different spots on the wall.The heat sink with patent structure pending is of strong heat disspation, the thermal capacity can up to 48W while the power of the whole light is designed as 38W (ideally replacement for HID 70W). So it is of the most stable quality and ensures 60,000 hrs of lifetime.