... Anti Extrusion,Useful service life is10 years. LED letter signs:1.High bright (In side the light is LED ... time3.Up to 90% energy saving4.Environmental-protectionLED letter signs popular in Europe have the advantage as following: 1 ... be widely used in many places, such as shop signs,bank signs,hotel signs,hospital signs,school signs ,advertisement, architecture, decoration, exhibition, and lighting, etc ...