With the technological innovation and cost reduction, accelerated application of LED downstream applications, LED lighting has become the largest downstream market. In recent years, all countries have introduced a schedule of incandescent lamps. As early as 2012, the EU, Japan and Canada have totally banned the use of incandescent lamps. Since 2014, the United States prohibits the sale of 40W, 60W, 75W and 100W incandescent bulbs. At the same time, China also prohibits the import and sale of incandescent lamps of 60W and above. With the lower price of LED light bulbs, the future market penetration will be further enhanced.