Hello people of grasscity, im new here and to growing. I havnt begun yet because i like to know everything before i start, and waste money fucking up. I plan on growing 4-5 plants in an average sized white closet. My question is, with a 400W hps/mh light, how far above the plants should i keep it, to prevent plany damage or stretch? Also, is 400w enough for 4-5 plants in a closet growing space?