And then there were two....I transplanted the last 2 white widows into mix with double the correct amount of compost. twp weeks later they're basically suffocating and yellowing. Had to cull them unfortunately, but it's OK because I'll need my other tent soon. Now it's one Orange Hill Special and one White Widow under the Hortiled.
The light seems OK at 20 inches above the tops - I think the first plant got light burn because I hung the lamp diagonally across the 3X3 tent. One end was wedged into a corner with the sides acting like a reflector, with the lamp only 16-17 inches away it was too much. Two of these are not going into one 4X4 tent....too much, needs 5X5.
Also Cannablüm spectrum may not help stretching that much, the white widow plant still got pretty leggy. WW on the left is 3 weeks, OHS on the right is at 4 weeks