Ceramic Metal Halide (CMH) round or flat back cylinder with integral ballast. Phenolic baffle finishes appearance and reduces glare from the interior of the housing. Cylinder accepts accessories such as Nora louver or barn door attachments, as well as color filters (by others) to provide flexibility in designing for greater control or special effects. Electronic ballast is encased in unique slim ballast casing and is suitable for use with high CRI ceramic-type PAR metal halide light sources. It is one/two circuit track compatible. Features integral on/off switch.