Ultraviolet lamp resistance chamber can simulate the sun, rain and dew to damage the material, UV machine using UV lamp simulate the effect of sunlight, cold rain and dew. Being tested materials are placed in a certain environment which the light and moisture are alternation. The materials are tested for several days or weeks so as to know the damage of material at outside for several months or several years.Damage types include: bleaching, discoloration, loss of light, power, crack, turbidity, bubble-based, embrittlement, strength decline and oxidation.