Your plants are coming along nicely. Yes they're still small but how far into flowering are you? 3, 4 weeks? There's still at least another 3-4 to go in my opinion. You can try adding unsulfured molasses into your feedings, that can help bulk things up. And just try to keep the most consistent comfortable environment possible. Warm, a little humid, and good lighting.
It's just my personal opinion but i think all living things benefit from sleep...maybe you might consider dropping down to a 20/4 schedule? I see many of my plants do good growth during dark hours, and less stress.
Watch for your pistils to change color and shrivel up and that'll be a good indication that flush time is coming. Also try some close ups of the trichromes here in like 2 weeks and watch for them to slowly change also.
Happy growing. ✌️