the main reason plants foxtail is light issues , the other reasons could be stress, gens and temperatures. can you actually have too much light with LEDs... kinda not, i mean the sun is the brightest thing you can find on earth , probably beats 10 1kW lights no problem, and it does it daily. What might have happened is inconsistent lighting. So if you add more and more light, the plant freaks out because it's expecting less and less light as time goes on. Say in nature the plant should live through summer then near the end of its life in autumn which would have less light not more. So that's a common source of stress. Varying light distances also doesnt help if you don t do it right, that could be the other source. As a final comment on foxtailing : does it suck ? yeah a bit, but those foxtails are hella potent , and in the end they dont end up hurting yield much at all. Just check the trychomes, for when it's done. If it's started foxtailing, nothing much you can do about it - just ride that wave all the way to the finish line. Hope this helps bro! 🚀