The luminous characters are black during the day and white at night. The common material is acrylic black and white board, which has high transparency and color spreading performance and is easy to process. Acrylic can be used to make luminous characters, light boxes, etc. It has good weather resistance and long service life. When choosing suppliers, businesses should prioritize well-known brands to ensure quality.

However, it should be noted that when selecting acrylic suppliers, it is recommended to prioritize manufacturers with well-known brands to ensure quality and effectiveness.