m0useanswered grow question 9 months ago I agree with Organoman, everything need downtime, plants are no different.
Can you grow at 24/0, sure but that's only when shits locked in and even then its hard on the plant.
18/6 is best IMO or w/e hits your DLI of 35-40 thats over 12hrs.
Otherwise the plants don't look to bad. I think your overthinking it.
Good Luck!