Songhao Liu, an academician of Chinese Academy of Sciences (CAS) and the famous optics and lasers scientist professor, recently stated that LED lamps will replace incandescent bulbs soon, occupying the lighting market. He believes that the key technical constraints may hinder the development of China LED industry. LED to be Popular Compared with conventional incandescent lighting, LED has many advantages: first, it is a solid device, without filament and glass bulb, so it is not afraid of vibration and brittle. Its service life is up to fifty thousand hours. S...