With the green power coming, lighting industry is going to be energy-saving and environmental friendly. In 2008 Olympic game, 2010 the world expo, LED industry meet its best time for improving. The following is advantages in led high bay . The power driver for led high bay is direct-current supply. The supply voltage is between 6 to 24 voltages, it depends on the luminaries. It is much safer and more stable than the high-voltage supply, which makes it better for public lighting. Another advantage is energy-saving. Compared to the incandescent lamp , the consumption of energy could be cut by over 80 percent. Nowadays, light efficiency of led high bay could reach 200lm/w.