In view of the perspective of semiconductor lighting application, people are unanimously optimistic about the development of LED industry in middle and long term, the penetration of LED in lighting market will continue to rise, it is likely to exceed 50% in 2016, even it may be more than 70 % after 2020 with further growth. Energy conservation and technology economy will become two important drivers of this trend. Currently, higher cost is still the obstruction for large-scale promotion of semiconductor lighting products, but the prices of LED has been steadily falling, accord...