I read a whole book on growing before doing this and just bought the mh because i had the money for it at the time. I measured the lights distance it was about 2 and a half foot away from the plants and it still was burning them. So i have a polytunnel at home so i decided to put them in there for a few weeks to heal them and get a bit of size then will move them back in to the grow light. So what ideally should the distance be between the mh and the plants if either of you guys can help? Thanks for the advice guys