Good stick to Veg. And what i mean by 12/12 thats the time you keep your lights on and off ,So 12/12 for flowering ,18/6 or 24/0 for veg. You dont have to move your lights stack somthing under the pots to make them closer to the lights. I said fill the plants up the rest of the way because it will make the stretch on the one plant that has sprouted less stretchy lookn .But its up to you . Also with the foil you might creat heat spots on your leaves and burn them I would get like 4 spray cans of flat white and just start spraying the whole inside of it (With out your plants and bulbs and fans in there of course)