... Environmental-protection Frontlit LED letter signs popular in Europe have the advantage as following:1.CE ,RoHS and UL certificated 2 ... is available: white,red,blue,yellow,green.... and full color7.LED transformer provided input:110V-240V,output:12V8.Customized ... signs,school signs ,advertisement, architecture, decoration, exhibition, and lighting, etc. Frontlit LED letter signs popular in Europe