Hi is it as simple as just getting a bigger extractor fan to sort out heat stress out or shall i just get a bigger fan thats in the tent at the min i have a 9" desktop in a 1.2x1.2x2 M tent and my extractor is a 125mm fan
Heat stress directly under the lights needs to be managed with better lamp cooling. Heat stress in the whole grow area needs to be handled by more airflow in & out of the area. Once the whole room the tent is in and the area inside the tent are roughly the same temp, flow in & out of the tent won't help and the whole room needs to be cooled.