LED Channel Letter Sign: 1.High bright 2.Over ... Up to 90% energy saving 4.Environmental-protection Frontlit LED Channel Letter Sign have the advantage as following:1. ... available: white,red,blue,yellow,green.... and full color7.LED transformer provided input:110V-240V,output:12V8.Customized design ... ,advertisement, architecture, decoration, exhibition, and lighting, etc. Frontlit LED Channel Letter Sign