That's what I thought. Edge lighting doesn't do anything like what led did. Led stays lit so even a glimpse from across a room reveals if you have a gmail or sms or hangout or outlook. Each could be set with a different color known to the user. The key is it is still on hours later. If you happen to wake up in the middle of the night you could see the led and know what it means. I know because I have done it since the invention of the original Droid.I don't think it's unlimited. It goes from short to "long." I don't imagine that "long" is all that long.