I have been meaning to ask if you are going to take clones. If you are I like to do it a week before flipping the lights. but you can do it any time. Doing it after they start bloom is a bit more difficult on the clone. But if you revert a blooming branch to veg it will be awesome and is called Monster Cropping. you can google that to find out. But I don't do it. I just clone what I want.