Honestly, there isn't a super firm consensus about it.
Because ball pythons are native to kind of a wide range of humidity levels. They're pretty hardy, and very tolerant of humidity mishaps (compared to some other species).
And aside from that, they are each individuals, just like us. Some humans naturally just have drier skin. Some of us have drier hair. Some of us are more oily.
That can be just as true for snakes. So cut yourself some slack, and pay attention to your individual snake. Shedding is a great way to monitor how well your humidity is meeting your snake's needs.
If you're unsure, make a humidity box and put it next to the warm hide in the tank. That's a great way to give your snake the ability to seek higher humidity levels if it needs to.
I never keep my ball python tank higher than 50%, I provide a humidity box, and the only time she ever uses it is when she's about to shed. And she's always had perfect sheds.
But I had a rescue ball python, with a lot of skin and respiratory issues, and he needed a higher ambient humidity than what is normally suggested for ball pythons.
So listen to your snake. As long as it's shedding well, you're fine with the lower humidity, and if you're unsure, get a humidity box to give your snake the option for higher humidity.
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