I mean closed, as if to not recieve light. I thought maybey to much light but have par of 400 ish ive been growing inside for yrs but have not had this issue before ,im using wet towels to bump up rh and bowel of water ,"humidifier died"temps are good and im able to stay between 50rh and 70rh im using pro mix and worm castings ,giai green amendments, if ph is tbe problem would ya say its to low or to high? I may need a new aprea meter