The incandescent light has the advantages of 100% CRI, continuous spectrum and immediate response. Among which continuous spectrum like for LED Lights is most helpful, since light with continuous spectrum is not dazzling which is most suitable for human. Some places like star hotel, museum and art galleries are still using incandescent light due to the special lighting effect it has. Besides the above mentioned, the disadvantage of less than 20% energy transformation rate and only one thousand hours of lifetime will make it hard to survive. The sad reality is, although energy-saving lights are promoted, they just can’t have the same lighting effect of incandescent lights, and they have the disadvantages of consuming rare earth, hazardous mercury and electric waste pollution.