T831 PAR30 Uno Open Back Track Fixture features a concentric gimbal ring that springs off the bottom edge of the chiseled monolith in a perfect example of form follows function. The monolith remains perfectly aligned with the trac while the gimbal ring mechanism is free to provide broad aiming capability. May be adjusted up to 90 degrees perpendicular to the trac in either direction and up to 45 degrees parallel to the trac either direction. Made of die-cast aluminum with finish in Black or White. One 35-75 watt, 120 volt PAR30 medium base bulb or LED equivalent bulb is required, but not included. Halogen bulb option dimmable with a standard incandescent dimmer. Consultant bulb manufacturer for dimmer compatibility when using LED equivalent. UL listed. Compatible with Juno Lighting Trac-Lites, Trac-Master 1-circuit and Trac-Master 2-circuit 120 volt line voltage track systems.