... in manufacture advertising equipment such as exterior light box,showcase,sign panel,display rack,booth and so on. We ... /discolour resistance,7 years long span Screen(Sticker): light-proof sticker,2 years span outdoor,3 years span ... span,both brightness of them are over 1500 lumen on the advertising/sign screen Front panel:pc board,hard ... and protect inside from dust. popular item of exterior light box