So I have a 600w MH/HPS light with a air cooled hood and 435 cfm exhaust fan. I have 4 plants in a 4x4x6.5 tent (DJS Blueberry, Blue Dream, P98 Bubba, Cannatonic). I just need to know how far away I should to keep the light from the top of the canopy. I have a couple pictures below of how they...