24 hours of light for quickest reveg! And yes the will revert to single leaves, just hang in there it will take some weeks to start growing normally. Anouther way is to flower your plant n harvest your buds leaving some growth on it and put plant under 24 hours of light till it grows vegitively again and then just clone.Taking clones that far into flower is PROBABLY gonna involve re-vegging. You wanna put the cuttings under a low wattage floro fixture and give them 24 hours of light. When they root, put them on either 24 hours of light, or preferrably a 20/4 cycle. They may go thru some serious changes (Leaves that are "spiraled" on new growth. Dont be freaked. (I was certainly freaked when I saw it) They will come back. When you start getting normal looking new growth, you can clone them again, then flower them. Cloning is best done in veg