Nutrient deficiency or surplus?

the burnt tips are from overfeeding but looks like that's under control now. The rust spots on the leafs are from calcium deficiency and the burning on the edges of the leafs is from magnesium deficiency. Other magnesium symptoms are the yellowing happening at the level of the veins of the leafs. Basically what happened is the intense light schedule is sending the plants into overdrive so they simply need more magnesium and calcium (and a less intense light schedule like 14hours or 12 hours). if you're already feeding cal mag regularly, one thing you can do more is make a cal mag spray and spray the plants two times this week. just use like 1ml, 1.5ml/L for the spray and spray just before "sunrise" . the absorption through the leafs is much more than through the roots so it will help fix the situation quicker. Hope this helps ! 🚀