... selling lines in global market1,LED crystal super slim lighting box is ultra-thin and ultra light; Optical-panel is used for even illumination2 ... ; And long life span: 50000 hours4, Specifications Size: A0,A1,A2,A3,A4,A5, B0,B1,B2,B3,B4,B5; ,,,,,200 ... for limited spacing, such as lifts, public channels, hallways, emporiums, super markets, subways, bus stops, etc. Crystal Super Slim LED Light Box