A crystal light box is a type of illuminated display that uses high-quality LED lights and a crystal-clear acrylic panel to showcase advertisements, images, or promotional materials. These light boxes are known for their sleek, modern design and are often used in retail stores, shopping malls, airports, restaurants, and exhibitions. 

The crystal light box typically features a slim frame made from transparent acrylic, creating a floating or frameless appearance. The LED lights are distributed evenly around the edges, providing uniform illumination and making the displayed content vibrant and eye-catching. The images or posters can be easily changed by sliding them in and out of the frame, making it a versatile and reusable advertising tool.