This is a 220 watt fluorescent 2 light, non-dimming kit , each fixture consisting of a 110V AC electronic flicker free on-board ballast, clip on/clip off main reflector with open face measuring 5"x23" and two high intensity 55 watt 5600° K wands and two barndoors with lifelong computer hinge. Each complete light is mounted on a ball and socket joint terminating in 7/16" diameter x 3" stud.