I'm looking at picking up a T8 with a divider to house two ball pythons. The cage will be kept in a room that is never cooler than 70 degrees. Is it unreasonable to assume I would be able to maintain cool side temperatures using heat tape/flexwatt only? If so, what size RHP's would be best suited to keep each side properly heated if I skipped the heat tape entirely? Are two 28 watt units adequate or would I go to the 40 watt models? Thanks for any recommendations you can offer.