100 watt mh in a 15"x15" space over 12 seedlings. At about 16" above runs temps at dirt level at about 85-90. With cooled ventilation i can achieve temps in the mid 70's. So watch how close you get them to light, and get some air movin. Also what did you transplant into? type soil. At 3 weeks any light nutes being added yet?
bobjob4u Reviewed by bobjob4u on . Help please Ok, so my plants are almost three weeks old and I just put the MH light on them about a week ago. The bottom leaves on two of em are turning yellow and dried out. I moved the light to about 16 inches thinking they are just too hot and it didn't make a difference. Everything above the first set of leaves is fine. I am planning on putting a fan on them and moving the light back down but will that be enough? Is that even a possible problem? Rating: 5