A group of about 30 people from Austin Energy spent the morning installing more than 3,300 light bulbs onto 39 streamers in Zilker Park for Austin's annual Zilker Holiday Tree display. On Nov. 27, the 155-foot-tall tree will be lit for the 50th year in a row and will stay lit and open to the public until Dec. 31. Check out photos from the installation of the tree Tuesday: [g-slider gid="197387" width="100%" height="55%"] Austin Energy also posted this photo Tuesday morning:   The tree lighting ceremony begins at 6 p.m. Nov. 27 in Zilker Park. Local entertainment, food, novelties and live music will be offered.