Some of the leaves are slightly curling up, and some are also tacoing, which could be a humidity issue.
Some of the leaf edges are canoeing, along with praying.
Some of them as has also been stated by
rkymtnman look like they are also curling down, and look overly green, and also some new growth is twisted.
Whats watering schedule, and PH? Air flow?? Humidity? Temps?
I myself have been starting seeds under 1000w HID since they came out in 1978 under 24/0 We use 1000w Hortilux HPS, Gavita 1150w DE HID, and Gavita 1700e.
Am also currently using a Gavita 1700e for seedlings/veg at 24/0. 24 inches from plant.
I'm not assuming, lots of experience trust me on that one. The twisted growth your referring too the tips that twist? Just so we understand each other.No. They can show symptoms by curling down. They may eventually burn though. Im sure you seen leaves curling down, with no apparent burn???
I wouldnt assume the twisted growth is from multiple light sources.
In photo #1-#2 there are leaves that are clearly curling down.
Im struggling to find the burnt tips, if so then maybe I have started overfeeding.No not just #2. Both. Theres a bunch of leaves curling down, and upon further inspection, I see some burnt leaf tips.
i am using gosund branded smart plugs with their normal firmware, not flashed to tasmota or anything.Dope. What are you using? I'm a fan of the TP-Link/Kasa stuff. They have an out of the box integration with Sense (see previous screenshot.)
i would stick to 18/6 but im with you on this whole "why not" thang. You should not be having probs like this. I see all the curls an non perfect spots on the plants but that does not concern me , im trying to get you back on 24 without issues. The few curls you have is not enough to critique. I chalk that up to growing in foodless medium. (meaning you can fix it with adding or subtracting a drop or two of something)
The overall health is good so why will they not grow 24-7 ? Looking at the curls will prolly not help this situation. At this point , you cannot go wrong with a balenced 1-1-2 or equivilent.