Sounds like a good plan.....
Do you think the period of darkness along with the cooling is considered their "photoperiod?"
I have often wondered how dark it is where a snake brumates in the wild. I would think it is pitch dark most of the time for them. That is why I don't think the shorter daylight hours are even noticed by a brumating snake in the wild. Thus I have never had timed lights on in the brumation chamber.....

But....Others have had great success just with minimal drops in temps and lighting cycled with daytime and nightime seasonal hours.........

Sure there are many ways but if it isn't broke don't fix it......lol
-----
John Lassiter

Poor planning and procrastination on your part does not constitute an emergency on my part...
www.coastalbendcaptivebreeding.com