1 strong light box,60% thicker 2 brighter,superficial lumen 1500, ... years experience in manufacture advertising equipment such as light box,showcase,sign panel,display rack,booth and so on ... . We are processing the metro sign and light box project for Shenzhen City. Good quality,lower price, ... bolished stainless steel/ fluorine carbon alloy tube. Light box Open type:door-open type,easy to change the ...