High light efficiency: all spectrum almost focus on the visible light frequency and the light efficiency can reach 80%-90%; but it only reaches 10%-20% for the incandescent lamp.

• 光效率高：光谱几乎全部集中于可见光频率，效率可达到80%25-90%25;而光效差不多的白炽灯可见光效率仅为10%25-20%25。