Screw the stretch then.
Full spectrum lighting from the top, the blue & red emitting from the "full spectrum" light only penetrates 1-2 layers of the leaf, the green wavelength will penetrate 4,5,6 layers, and the best ratio for flower growth is 1/2/1 R/B/G, and very little of the red and blue reaching lower parts of the plants or even the sides, flowers on lower parts of canopy receiving a majority of green will grow larf style buds, often lackluster, I supplement blue and red at the sides, I do not want to add more "full spectrum" this would double dose the green which penetrates deep.
By the end of week, I'm looking at bud sites everywhere, the density is exceptional and above what i'm come to expect in week 1.5, it was the like plant skipped the stretch and went right to bud site production.