I'm not sure if the is a reason, and what it may or maynot be, but I do know that if those lights were not on it would be nearly impossible to watch people in line and check the length of the line from the cameras in the drive box. The lights do still go out at the end of the preshow movie for a few seconds. And when that happens the hanger is impossible for us to see in. I don't know if that has anything to do with it, if there is a reason I don't know it, but that is a practical reason.