A few things;
Snakes that size are going to bulldoze/destroy most plants. Choose plants that can take a beating and/or quickly regrow after being torn apart. I think the snake plants, pothos, and philodendrons are good candidates to try (also consider ficus species), but bromeliads are definitely going to get torn down from wherever you mount them.
Mosses that work in vivaria tend to require high light levels AND near constant moisture. The moisture requirement can be problematic (and inappropriate) in a ball python viv (I've never kept BCI's).
The Jungle Dawns are very bright, yes. I don't like to throw a ton of light at nocturnal creatures in captivity. I know hides are typically provided, but the light still blasts in through the hide openings. (again, this is in reference to the ball python). In my ball enclosure which is 48x18x18", I have a single 36" 15W led tube light.
In closing, I think a good naturalistic setup for a large snake is more about fresh foresty substrate, woody rubble, and creative hiding places and less about maximizing plant growth. If some green stuff grows- awesome, but it's never going to be enough growth to consume/process snake waste, and it will mostly get bulldozed.
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