I would provide a 12 hour/12 hour light/dark cycle for your snakes. I use a timer to achieve this on all my reptile tanks.
Providing a day/night cycle helps them regulate when to hunt, sleep, and overall health.
I also feed with lights out, so nocturnal animals know, when the lights go out, it's food time. The snakes are ready to go as are my leopard geckos (who are also nocturnal). This also means if I go in during the day, it's handling time and not food time. I still hook train the bigger snakes, but this adds a layer of protection for me. For example, Behira, who will often strike the acrylic doors when she sees movement at night, does not do this when the cage lights are on.