After switching the light cycle to 12/12, the plants stretched about 10 cm. Everything is going smoothly. For now, they are being watered with tap water that has been left to sit for 48 hours. I'm considering cleaning up the lower parts of the plants by removing small shoots and leaves. Happy growing everyone.While doing LST training, I broke the main stem. After taping it back together with electrical tape, it healed nicely and the plant regained its vigor.