anole,
It is probably best to bring them in as you have. Rather than take a chance on losing them. With low 50's they would need to be completely dry and just not worth it. For me anyhow.
With them inside if they are receiving strong sunlight still, they should remain in leaf. If the light levels are lower you may notice leaf drop and even with the change from outside to inside this could still happen (leaf drop).
As far as watering goes, it will depend on sunlight, temperatures, etc. Monitor them and watering will reduce, but if they are still growing and in leaf, do not let them dry back too much. This can induce dormancy and lose leaves.
All of this is dependent on the above variables. Leaf drop and dormancy is not a bad thing. They will just not require much water until spring when they start showing signs of growth. Then start watering in moderation until actively growing.
I hope some of this helps and does not confuse issues.
Rick
