Gimbal Ring Track Head. For use with LED or incandescent PAR38 lamps, 150W max., medium base (E26) socket. Fits 120 volt 1-circuit or 2-circuit track systems. MODELS: 2777 (lamp not included); 2781 (includes 17W/1200 lumen/3000K/30° LED PAR38 lamp). Body in Black (-5), White (-6), or Silver Gray (-20). 5″ D x 9 1/2″ L