The day i start Flowering ,In the hps room is the day that i start seeds for the grow after the ones in flower,So i have a crop every 8 week,I normally run 8/9 week strains ,All the vegging is done with t5 ,I get them to around 18 inch tall,That is my flowering height,So the main lights are only ever used to flower.I'm in the Process of Building a New veg room,I wanting one a bit bigger than the one i have now,The 8 week veg time involves Multiple toppings,Not just the Main top,every single Branch gets topped,This gives me Rounded bushes Rather than Christmas tree shape.I have also noticed that if you take a Clone the same day has you start a seed,Then they end up pretty much growing round about the same height .I have done this many times,I leave my Clones for two week ,to root ,They don't come out of the Propagator till they are through the Bigger cubes,By this time the seedling is starting to build its roots in the coco .