I began a grow in a 3’x3’ grow tent, using HLG 260W Full Spectrum grow light. At first I had the seedlings about 40 inches away from the light at the lowest setting (135W). After about 4 days over stretching was becoming visible. I brought them much closer to the light but after about a week total growing, one looks ok but has stopped growing and the other has completely wilted.
I’m not sure what went wrong. I’m using promix HP, I watered the medium about 2 days before to let them dry, punched a bunch of holes at the bottom and side of solo cup and did not water at all after this. I’m going to start over with new seeds as I think these are too far gone. Can anyone with experience using these lights give me an idea of what distance/intensity to use at what stages?