Leds have the advantage of high efficiency and durable. These advantages make us do the energy saving, save money, make our costs under control and prolong the service life of the lamp. Due to the LED light radiation range is an arc of a fixed, not absorbed by lighting the light loss caused by or due to the light into all directions causing radiation Angle of the light pollution. On the other hand, when the LED is applied to the lighting industry, to this kind of its fixed arc radiation Angle is a challenge. Carefully designed lamps using LED as light source can ensure that within the scope of the irradiation light is evenly distributed.