I don't have any experience breeding in basements (snakes anyway) but lots of people do so quite effectively. I would suspect that it is actually easier to control temp and humidity ranges that are most beneficial for snakes. As for the photoperiod I really don't know what others do given a total lack of natural light. They may just simulate it with lamps and timers.
As I mentioned over at the ks forum, I have this thought about "total heat" were there is a relationship between heat and photoperiod. Keep in mind that I'm using human terms here so don't burn me at the stake for going anthropomorphic, I just don't have the time to couch this in the proper terminology. Anyway, the idea is basically that snakes equate the amount of light with the reliability of their heat source. For instance (and this is all made up) say you provide a hot spot of 85 degrees and no photoperiod. The snake interprets this as a temp marginal to facilitate digestion AND because it has no photoperiod to judge reliability it does not eat. At a 12-hour photoperiod it may still refuse to feed but at 14 hours it feeds even though the temp has not changed. Likewise, if you provide a 100-degree hot spot the snake may eat regardless of photoperiod. In any case "total heat" is a function of heat quality (how high) and reliability (duration of photoperiod). Snakes may react to 100 degrees and an 8-hour photoperiod the same way it does 85 degrees and a 14-hour photoperiod. This indicates an inverse relation ship between the two elements. If one goes down the other must go up to maintain the same behavior.
All said, if this has any merit, I would think that given a lack of a photoperiod in a basement, you'd need a warmer hot spot to keep your animals feeding well. A few degrees higher certainly can't hurt!
There is another side of this too. My room has great access to a natural photoperiod and temps are very consistent. Given this I've always seen the natural light as a limiting factor in breeding my coastals because they generally go off feed as soon as the seasonal shortening of days enters its period of maximum slope. This year I intend to adjust temps upward in late August to compensate for decreasing photoperiod and see if I can extend their feeding season another month or so. In a basement however you have complete control over both elements so back ground limiting factors are no such an issue.
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That is a a completely narcistocanibolizistic thing to say!