Two more columns of paired lights have been added to the previous lighting rig and have been arranged in a semi-circle arrangement with spot lights at the ends and one in the center. The side lights have been connected to the ceiling lights. They start from the sides of the stage and run upwards in a semi-circle and meet at the ceiling (as shown in the picture). God knows how many lights were in that rig. You can see these lights in the Tie Your Mother Down video or the We Are The Champions video shoot.