The RL428 has been engineered for new construction and works in Elite 4" (LD4IC-AT, LD4-AT, LD4R-AT) housings and existing Elite 4" incandescent housings (or standard B4IC-AT, B4-AT and B4R-AT). Also suitable for use in most 4" recessed downlight housings. A 5-color SeleCCTor switch allows the contractor to easily switch between five different color temperatures in the field.