That sucks man! Hopefully you won't see any problems! From what I know (which isn't much) the plant gets triggered to flower because it receives that 12 hours of uninterrupted darkness which allows it to build up sufficient levels of the chemical that 'tells' the plant to produce flowers. Long story short, I'd rather mess up my light cycle than my dark cycle. Regardless, it's a 'stressful' situation for the plant. Keep a close eye for nanners and beaners.
Agree with catofcuriosity, turn em on and get your girls back to growing.