Heres a cage we just built, we live in wisconsin so a screen cage was out of the question but as far as this one goes its got ventilation, Its vented sides and rear with 6 3 inch holes on each side and 12 3 inch holes in the rear, will this be eneough or shoul we use a screen top as well. The internal temp rite now is 90 degrees at the top near the lites, with 2 150 watt basking bulbs during the day and a couple 75 watt nittime bulbs.