There are a LOT of different thoughts on ball python husbandry. You see just a small sampling here and most just point to a care sheet. I keep my ambient temp around 73-75. During the winter the ambient temp has even went into the high 60s. My hotspot is around 88. I know people that run similar temps and some people tell me my snakes will get sick the way I keep them. Well I have been keeping balls for just short of a decade now and no RI yet. Ball python husbandry is like everything else in life. If you hear info don't roll your eyes at it. Listen to it and take notes. There isn't always just one answer to everything. I feel ambient temps of 80 or more and a hotspot of 90+ is too hot. However if it works for you then stick to it.