Neon is when your idea comes alive with illuminated glass in various choices of colours. Neon can be used to outline your new design and become a display on its own or just highlight an existing sign. One transformer works on approximately 40 to 65 feet of glass, depending on the type of gas being used. The fewer wires exposed, the more attractive the display becomes and the fewer maintenance problems you are likely to have. The length of one piece of glass should not be longer than 8 feet. Longer units are harder to install and are more prone to breakage.