Illuminated /Electrical Signs Electric signs are the easiest and most beneficial way to advertise your company and increase the aesthetics of your building or storefront. Illuminated signs will light up the night with each glowing letter. Our Channel letters are available in numerous colors and designs that will transform your entrance. We also offer ground signs to be displayed roadside along any major road. Sightmark provides simple rectangular designs or custom designed shapes that will fit worry free into your budget.