Automotive ambient light using light diffusion Polycarbonate material can greatly improve the product's scratch resistance and weathering performance, this material is high hardness, scratch resistance, not easy to yellowing, greatly improving the aesthetics of the product, new material modification, mature formula, stable performance, color batch color difference is consistent, the yield rate increased by about 5%. Light diffusion Polycarbonate material is not only used in automobile ambient light, but also used in automobile rear tail light and home lighting lampshade above the modified plastic.