I noticed years ago, when I went from a 600W hps to 1000 watts of blurples, that my plants in the corners didn't have stunted growth in the shaded parts away from the lights. So the plants clearly move nutrients around when there's enough light.
But I also noticed a remarkable difference in my yields when I went to 670 watts of Samsungs - at least 30%. So there's something else involved. A lot of that improvement came from lower growth. Under the other lights it was airy and a PIA to harvest. Under the 4200 Samsung diodes it was all firm and solid, amounting to as much as a half ounce of some plants -
not schwag.
I've also looked into hormone movement etc, trying to decide if defoliation made sense, and trying to better understand the organic processes. Fan leaves, for instance, grow out of the hormone loop, so if you remove them, it has little effect on the hormone processes. Fans are kinda off on their own, producing carbs for the plant. If you remove new growth it alters hormones in the nearby tissues and encourages new additional growth.
Obviously, something is happening in the lower growth because of the improved light dispersion - penetration if you will - that wasn't supplied with an equal intensity of 5 blurple panels spread across the sky.
I think it must have to do with the lower sugar fans - the new growth - getting more direct light than before.
That makes me think that in addition to translocation, a significant amount of nutrition is supplied by the nearby fans. I also notice that all my plants have a beautiful green skirt of foliage at the bottom now, and since it rarely gets
too much light and always gets
enough, it's always green and unstressed.