... long life span Specification: Product crystal light box Composing acrylic panel,light guide panel,switch Size A1, A2, A3, A4, other ... picture is easy to change the light is well-distributed and soft Light source LED light Voltage input 110-240v, output ... hotel, restaurant, café etc lAdopt high quality LED as light source, brighter than traditional light box and saving energy 70%lLow heat generation ...