The specific spectral energy distribution that the light source specified in the UV aging test chamber test standard should determine the nature of the light source. At present, the spectral energy distribution of ultraviolet light in the fluorescent ultraviolet lamp exposure test is realized by using different kinds of fluorescent ultraviolet lamps, the radiation of the fluorescent ultraviolet lamp is mainly ultraviolet rays, a very small amount of visible light, almost no infrared rays, and the ultraviolet aging test chamber is commonly used. There are three types of fluorescent UV lamps:
1. UVA-340: In the short-wave region which has an important influence on the photochemical reaction of non-metallic materials, the ultraviolet radiation of the lamp is consistent with the outdoor sunlight, and its radiation peak is at 340 nm, and the relative spectral energy distribution should comply with relevant regulations;
2. UVA-351: its radiation peak is at 350 nm, and the relative spectral energy distribution should comply with relevant regulations;
3. UVB-313: The radiation of this kind of lamp includes a part of short-wave ultraviolet lamps less than 300 nm which are not present in outdoor sunlight. The radiation peak is at 313 nm, and the relative spectral energy distribution should comply with relevant regulations.
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