... , energy saving 2.long life span Specification: Product crystal light box Composing acrylic panel,light guide panel,switch Size A1, A2, A3, A4 ... , hotel, restaurant, café etc lAdopt high quality LED as light source, brighter than traditional light box and saving energy 70%lLow heat generation ... Advertising Materials Co., Ltd.Company Address: Tonghe, Baiyun District, Guangzhou, China