AsNoriuanswered grow question 2 days ago On such distance that light wont do any harm to mature plant, fact.
I see some marks on taller one, looks like calcium or ph fluctuation.
By diary - you are in soil, make sure you have stable and full wet/dry regime, plus watch ph , 6.2-6.5 work best in soil.
Calmag additive is needed asap.
5 liter pots are too small, some root bound can form, that will lead to nute uptake issues.
I would transplant them into 15 liters before flip to flower ...