Hi, I have 5 clones on day 33 of veggie. Lights are operating at 450 watt, 16/8, and are MH. They are 40 cm / 16 inches high now. Looking to initiate flowering at 60 cm / 24 inches. Will switch to 12/12 and replace MH bulb with HPS. Does anyone have an estimate of how much taller the clones...