I purchased my tank from a good friend a few years ago and didn't change any settings/timers on his profilux. He helped me get it set up and running. He no longer has the computer/access to the unit. In the last week, my lights have completely changed settings---don't know how to change/don't have accesss etc. They were set to come on at 11:00 am and go off at 10:00 pm....now they are on at about 3:00 am and go off by 2:00 pm...never even home to enjoy the tank. I'm at a loss...by no means am I technologically sound. Any ideas/help that you can provide would be greatly appreciated.