Edge-lit LED signs are an attractive, high-tech way of advertising your business or products. They are energy-efficient and are easy to assemble from acrylic panels and LED tape. The key to a good sign is how you engrave the image or lettering on the acrylic plastic and how you mount the acrylic panel so that the edges are brightly lit with the LEDs. Colored LEDs or multi-colored LED tapes enable you to choose the color of the light in the sign. The engraved parts will light up while the rest of the sign stays dark, producing the illusion of floating letters or images.