Accelerated weather conditions simulate the harmful effects of prolonged outdoor exposure of coatings, materials and products. There are accelerated weathering tests for a variety of outdoor conditions, including wind, rain, icing, sand, dust, and of course UV exposure.
There are a number of standards that include accelerated weathering requirements.
Both fluorescent light sources and xenon arc UV light sources are used to estimate the effect of sunlight on a product or material. Both are used to simulate indoor sun exposure and outdoor sun exposure, but xenon arc light simulates natural sunlight more closely.
Xenon arc UV light is the preferred choice for testing outdoor products, making the ASTM G155 standard a more popular choice for materials and product manufacturers for sunlight exposure testing.
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