LED bulb is designed with an inner MCU chip, which can be programmed, to synchronous work on color changing without connecting to controller. It is characterized as high efficiency, energy-saving, and long life. The available colors are red, green, blue, yellow, white and seven-color. It can realize such light effects as seven-color change, flickering, chasing, flowing and other modes. They can be used in groups to make up a colorful line, two-dimension plane or solid shapes. We also can write specific programs according to the requirements of customers. Its is widely used in brightening the outline of a building, plaza, road, advertising, stage, bar, hotel and etc.