4 week old. Soil grow. Temps can get high around 38 degrees Celsius( taking care of that. Leave ac on in room during hottest part of the day. Brings tent to 28 degrees) Humidity around 60%. Enough water and some nutrients.18/6 Marshydro TS1000 LED 150w, about 50cm above tops. Some plants have curled leaves some don't. Some higher some lower. Seems random. Would think temp stress but others in the tent seem fine. Light burn maybe but like I said some have it some don't. Thoughts?