The Day and Night channel letters are made with the help of special perfo film 3M Dual Color Film, which is applied on the surface of the letters. The color of the film is black and its structure is with micro-perforations. During the day the channel letters practically seem dark gray, but the human eye sees them as black. During the nighttime, the LED lighting breaks through the thousands of micro-perforations creating white illuminated channel letters illuminate (very bright gray). It is possible, that by using different light (other than white) to illuminate the letters with other colors that change through time (by using RGB LED modules).