03-22-2011, 02:43 PM
You really don't need to use grow lights until the stems are tall enough that they are bent over toward the natural light coming in from your window(s). Generally at this point I would of already transplanted them into their growing containers (I grow in pots not in the ground).
It sounds to me like you are baking your seedlings. Try raising your light up 2-3' over the top of the plants. 12 hours of light is correct, that is what we have now.