I use a 400w MH/HPS for veg and flower, grow space - 6ft-5ft, I use Canna coco soil, with Canna tera vega/flores nutes, and PK 13 - 14 booster.
I have 2 extractor fans, (4") for the smell and temperature, plus 2 heat mats, incase it gets cold during the dark period.
My flowering pots are 28 - 32 cm, and I feed once every 3 - 6 days, depending on the humidity.