The QUV simulates the effect of sunlight with fluorescent ultraviolet (UV) lamps, while it simulates rain and dew with condensing humidity or water spray. In a few days or weeks, the QUV can reproduce the damage that occurs over months or years outdoors. Types of damage include fading, color change, chalking, crazing embitterment, strength loss..ect.  The test datacan help in the selection of new materials. the improvement of existing materials or the evaluation of how changes in formulations affect product durability.