ound LED is based on the wide band gap semiconductors GaN (gallium nitride) and InGaN (indium gallium nitride) with round shape. Round LED can be attached to existing red and green LED to produce the impression of white light, but white LED now rarely uses this method. Compared with other light sources, it takes many advantages including high reliability, long lifespan, high shock and vibration resistant and high luminous flux output. In addition, it contains no mercury that is environment friendly and perfect for automotive use. It is in small size and can be used combined with other electrical component such as sensor, dimmers and lighting control. The Round LED is mostly used for indoor and outdoor commercial lighting, general lighting, automotive lights, LCD TV / monitor backlights, and LED display and so forth.