Sorry Roger I got off the topic there. In regards to exit lights, one of the things that was conirmed in the night club fire in Rhode Island was the belief that people exit in the same door that they enter. You could have had 5 exits from that club and there still would have been a panic to escape out of the front of the building. In many types of buildings, the "main entrance" is required to be signifigantly larger than the other doors. With that being said, perhaps the idea is that, if you can't see an exit sign, hopefully you can remember how you got to where you are and get back out.
