The sign mounted on top of the Grand Lake Theater is the largest rotary contact sign west of the Mississippi River. It measures 52 feet high by 72 feet wide and consists of 2,800 colored bulbs and was designed by Theodore Wetteland. The firing sequence is controlled by a device much like a music box. The sign is typically lit Friday and Saturday, from dusk until the start of the last show of the night. The display goes through two sequences, one with red lettering, and includes a simulation of fireworks. It's an eye catching display, to be sure.