It's just a dang big VU meter.
That's all I'm sayin'.
-- Tiny Elvis
Imagine...a billboard that will actually get listeners to tune in! Each "led" was 12" x 24" and backlit with traffic signal bulbs. 28' long!
World's largest VU meter.
Video loading> wait a few seconds. Not the best
quality (VHS camcorder) but you get the idea.