Regarding the appearance of road stud lights, there may be these standards and requirements. For example, the surface coating of road stud lights should be uniform and free from blistering, cracking, scratching, peeling, and wear. The lenses of road stud lights should be clear and transparent, free of impurities, scratches, and contamination. In addition, the road stud light parts should not have apparent dents, scratches, cracks, deformation, and pollution. The metal parts of the road stud lights should not rust, and the fasteners of the road stud lights should not be loose.