We installed reverse Channel Letters recently for the Coach Men’s store in Camarillo. Reverse Channel Letters (or sometimes known as Halo Letters) refers to the open side of the sign that faces the wall. Reverse channels can also be used without any illumination. Reverse lit, back lit, and halo lit refer to the illumination coming from behind the letter rather than from the face of the letter. The channel letters are mounted off the wall with studs so the lights can cast the lighting around each letter from the back.