Id just like to hear from a more experienced grower if 18 plants, 3 weeks pre-veg incl sprout under 100w then 3-4 weeks under 2x400w, total vegtime 7 weeks, topped once and than LST, flowered around 15inch
Or
20 plants with total veg time of 5 weeks, toppee once, LST, flowered at 10 inch