So im going to be gone all day 2morrow and was worrying about the temperature in my vivarium. The highest temperature my vivarium has gone is 83 degrees. When i home i run the a/c. Should i leave the lights off 2morrow. I have a 60 gallon with 6 leucs in it. There is a glass lid on top with no ventilation. I have two themometers in the tank. One on the near bottom of the tank that reads two degrees lower than the themometer on top. The one on the bottom is reading 77 degrees and the one on top is reading 79. I do have another lid that consist of 2/3rd plexiglass and 1/3rd screen lid.Should i put that instead? What is the best option i have?