Currently used artificial light is trying to close to the energy distribution curve of the solar spectrum at this wavelength range, simulation and acceleration rate is the main basis for selection of artificial light. After nearly a century of development in the laboratory there has been enclosed carbon arc lamp light, sun-type carbon arc lamps, fluorescent UV lamps, xenon arc lamps, highpressure
mercury lamp and other light sources to be chose. Carbon arc lamp of sunlight, fluorescent ultraviolet lamps, xenon arc lamps are recommended by the technical committees of polymer material in International Organization for Standardization (ISO).