Is this sign of deficiency, to close to light, or toxicity?

Looks like you got nute burn in one picture tips crisp and curling in, nitrogen toxicity in another where leaves are clawing. I would start with what is your soil ph via runoff. First step to take with any deficiency. Not enough water can easily be the case as well. My plants those size I water every day to keep moist, and feed ever other to flush old chemicals out and new in and monitor ph in substrate. You nitrogen level is too high just starting though. In vegging stage n p k ratio is 3 -1-2. In flowering it is 1-2-3. With auto you have to switch gears as they start flowering. Good luck. Hope this helps. Happy growing 🌲🌲🌲👊

Hi! Ik denk dat ze te weinig water krijgen, ja bladeren zien er wat verwelkt uit. Volgens mij staan je voedingsstoffen op punt. Wacht even de reacties van mijn medegroeiers af, voor de zekerheid🙂 Succes met groeien!🌱