chasv77answered grow question 5 years ago I would say after two weeks left they are fine. I had my heated grow box shutdown over night last winter while it was 4 weeks in veg, and it was in total darkness as well as 50 degrees for 24 hrs.
It definitely stunted the poor girl for about 2 weeks, but with two weeks into pre-flower (4 weeks later), it looks lush and full, and so far no signs of either sex. I expect no bananas, but will add to this post if it does.