first of all ide put each plant in there own pot and make it big pots. trash cans or buckets i fancy trashcans. moor room for the roots to grow. yes about 12hrs of lite is important because plants grow at night in the darkness. one thing you could do like i do at the end of harvest before i pick my bud a cover my plants in a box and in complete darkness and this will make the plants grow like crazy one more last time. so until you get light you could somehow put your plant into darkness for 12 hrs then bring her out so she has enouh time to get equal sun also. hope i have helped you