... advertising equipment such as outdoor light box,showcase,sign panel,display rack,booth and so on. We are ... span outdoor,3 years span indoor Light source:t8 philip,over 10000h life span/cree led,over 50000h ... the advertising/sign screen Front panel:pc board,hard to be broken,turn color 2 years span outdoor,3 years ... and protect inside from dust. aluminum double sided signage material for airport, metro