A modular valance fixture includes at least one elongated light fixture including a channel frame having a first end and a second end and to which a plurality of lights are mounted. At least two identical bases each have a distal end and a mounting end that mounts to a wall. At least two identical sleeves each include a slide end that telescopically receives the distal end of one of the bases, a distal end and a tube having a first side and a second side. Each of the at least two identical sleeves are oriented to either act as a left-handed support or as a right-handed support for the at least one elongated light fixture. The first side of each tube of the identical sleeves includes a cutout that faces one of the first and the second ends of the channel frame of the light fixture.