Acclimation,Waterproof,anti-explosion,shock resistance,Anti Extrusion,Useful service life is10 years. LED letter signs:1.High bright (In side the light is LED model)2.Over 100,000 hours life time3.Up to 90% energy saving4.Environmental-protectionLED letter signs popular in Europe have the advantage as following: 1.CE , ROHS and UL certificated2.Super high brightness,Light uniformity,over 100,000 ...