... 60% thicker 2 brighter,superficial lumen 1500,long light span 3 discolour resist 4 easy ... years experience in manufacture advertising equipment such as light box,showcase,sign panel,display rack,booth ... mall,business street,airport and so on.As light box or sign is available.Product specification ... discolour resistance,7 years long span Screen(Sticker): light-proof sticker,2 years span outdoor,3 years ...