Jay, I won't venture to guess how much daylight a wild ball is exposed to. They'll do what they have to do to get what they need. In other words, I'm sure they'll hunt during the day if they can't find a meal during their nightly excursions.
All my snakes are kept in the dungeon, my basement, and the only natural light they get comes through a single 12" x 6" window. They sleep during the day and are active after natural darkness, with or without excess lighting. I believe all animals have their own internal clock. It's been there for millions of years, and it's in their nature to act in certain ways.
This doesn't mean they can't be conditioned to act in a different way. It depends on what they are subjected to. Just my thoughts.
Quig
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