Every strain will be different as to it's light needs. Running clones multiple runs helps to really dial it in but I like variety so I usually have a new strain or two each run.
I did the math and you're around 75 degrees which might be part of the reason. I've found LED grows want to be warmer, at least 80 and most of my strains like 82-84F so I'd say you want it to be around 27C. They seem to be more tolerant of high light at warmer temps. I don't know what humidity levels you're running but this VPD chart was helpful for me to understand where I should aim during each stage.
Vapor pressure deficit (VPD) chart & calculator for horticulture in controlled environment. Cannabis, tomatoes, leafy greens, cucumber.
vpdchart.com
Good luck hitting your target yield!