How do people keep masses of them in tubs?

[Eventide]

Ball Pythons are nocturnal, and 12 hours of light would really stress them out.

Most reptiles, whether diurnal or nocturnal, benefit from regular day/night intervals. I kept my normal female in a 40-gallon tank with a bulb set for 12 hours on/12 hours off, and she was as happy as a clam. In fact, she hated it when I moved her to a tub. She's used to it now, though, thank goodness.