I had to adjust my lights' locations, and added a JUEYINGBAILI Full Spectrum Light to try and hit all blind spots and corners, and get more to the smaller plants. I rotated the plant positions as well. The plants really took off this past week and growth was abundant.
@CanadianFillmore, thanks. It's the one plant in the corner which is/was growing heads and tails above the others. Got feminized seeds from second-hand vendor, so I'm curious myself. Most are 3-4 feet, except for the 3 5+ footers