The led light is an AC Infinity Evo 4. Full Spectrum led, 3X3 space.
The plant it the picture isn't suffering from too much light. Overall, your plants are getting about 400µmol which is right in the middle of the "legacy light levels" of 300, 300-600, and 600+ for seedling, veg, and flower.
That's an estimate of PPFD because I can't find a PPFD map for that light at 24" hang height. 24" is very high for an LED grow light. I've had trouble finding hang height recommendations for AC Infinity light so I resorted to chatGPT to search. The graphics below are what it retrieved.
This is the PPFD map from the AC Infnity site:
In a word, these recommendations are bullshit.
Putting 1350*0.4=540µmol on a seedling is a good way to ensure that it never gets to the vegetative state, even if you're running CO2. The other recommendations 80% at 18" for veg (1080µmol) and 100% at 18" in flower (1350) would be on the high end for CO2. I have no idea why AC Infinity would recommend this much light and I am very aggressive in terms of ramping up PPFD.
What's interesting about the plant in question is the lack of nodes/the huge internodal space. It looks like it's just now sprouting the fourth node which is about 7-10 days later than I would have expected (my knowledge about soil growing is limited because I grow in hydro).
Per the posting by
@Syntax747 and my reply, the EVO 4 has a "hot spot" in the center. That's something to take into account over the course of the grow but I'm wondering if the "problem plant", whom I dub "Stretch", was perhaps shunted off to the side and just not getting a lot of light. Could that be the issue?
Stretch has great color and really well formed leaves so unless she's been treated in a significantly different manner than her tent mates, I'd see it as an issue of genetics.
