Wow I think you may have me beat
I have a few things for my grow which I will try to fix next time.
-add Coco to light mix next time, it compacted when watering and I think roots struggled to push through it without Coco.
-get an accurate 8 meter
-find out what my tap water has in it (or assume portable a/c water tank is a safe source)
-forget Coco (jiffy) pellets and plant straight into soil. And make sure soil fully fills pots.
---- find a space with longer light window
Sorry more for my own good to write this down as I haven't done that yet