Some advice please. Alll plants are healthy, nice and green. They are under 600w hps, just started nutes, from seedling they have been under light for 6 weeks, 3 others were behind and from seedling been under for 4 weeks. Not sure when to flower as I have lstd them and tied some of them down. First time lst, When would anyone recommend to switch 12/12? Are they too short to start flowering? will the stems stretch out more during flowering, get bigger i mean? thanks. 3x bubble kush, 1x power flower, 2x others.