I agree with MMJMD, flip your light schedule. If your already using AC and running your exhaust fan at full speed, thereโs not much more you can do. Air intake from outside would help but only if temps outside are cooler than inside- which can be tricky during the summer months. Some lights are just not well suited to certain spaces because of temperature concerns. If this remains a consistent problem, I would consider LED lighting as it produces considerably less heat while still offering excellent light coverage/penetration. Just a thought, good luck and all the best growing forward!