I have a propagation tray with a humidome on it, under (1) 100 watt MH
and a seedling heatmat set to 80*. I keep the clones in this environment for about 2-3 weeks, or until roots are showing and new growth is evident. Then they go into 4x4 rockwool cubes. Then they veg under 800 watts of MH400 watt and HPS 400watt for about 7-8 weeks.
All the while I supercrop them creating multiple branches.
6 weeks at 18/6, one week at 16/8, and one more week at 14/10, then flip
to 12/12 and put into my flowering room under 1400 watts HPS. Seems to be a good formula.