I think the air temp on my cool side is too low , 74, but my bp seems to like it, he spends most of the day in his warm hide which is 85 inside and the surrounding area is 80 but does come out to regulate on the cool side and just lounges around. I feel the overall tank temp needs to come to 80 and I'm considering a overhead heat lamp. Any suggestions on what wattage will bring it up 6 or 7 degrees? Or a better alternative?