These were 90 days old on a strict veg schedule at 18 hrs a day, under about 60,000-70,000 thousand lumens of cfl 6500k. then I swaped out to 2700k 50-50 mixed when i switched to 12/12.I figure they are coming in to thier fifth week of flower. they are now mostly 3 ft to 4ft and starting to fill...