... span 3.Up to 90% energy saving 4.Environmental-protection Frontlit LED Channel Letter Sign have the advantage as following:1.CE ,RoHS and UL ... is available: white,red,blue,yellow,green.... and full color7.LED transformer provided input:110V-240V,output:12V8.Customized design is ... signs,school signs ,advertisement, architecture, decoration, exhibition, and lighting, etc. Frontlit LED Channel Letter Sign