Abstract: A channel letter has a rear surface for mounting against a raceway, wall, or a structure for supporting the signage, and sides defining the figuration of the letter or shape to be depicted. A lighting element is positioned against the rear surface of the enclosure. To retain the lens to the open front of the enclosure, a shoulder is provided along the inner surface of the sides thereof where the shoulder defines a plane parallel to the outer ends of the sides but is recessed therefrom. A planar transparent lens having an outer edge which is in the shape of the letter and sized to fit within the sides of the enclosure is retained against the shoulder by a suitable retaining means such as screws.