What lights are you using? Have you said? My 1k hps I keep about 20" up. Also when your vegging put your lights up to 24hrs. They grow good and then 2wks switch to 12/12 for about 9-10wks. Your elec. bill isn't going to show it.
Take some white paper plates, cut to the middle and at the middle make cuts like a star and then slide one on each pot careful placing the plant in the middle.
This will reflect some light back and also stop the fugus flies.
Also it REALLY is all ph. You must control it at 6.8-6.2