@Donaldj
Is it possible that the viparspectra 600 watt LED is to much for the tent I have it in?? Everything seems ok, except for the brown spots that eventually turn the affected leaves dry and dead… The roots feel good… The Plant is drinking water… And the PPMs are going down each day… I have a 2’ X 4’ X 6’ tent, but part is a shelf, so the 600 watt light is over a 2’ X 3’ section at about 42" from the plant canopy…