The White OG

Day 21 Flower; The 2 White OGs in the back have grown quite a bit more than the two front, I'm theorizing its due to the window ac in the grow room having a stuck thermostat and overly cooling. It was running 72 degrees for several days during lights on, So, I've been monitoring that more closly, and partly closing the front of the tent and reducing the speed of the oscillating fan outside. There's an oscilatting fan in the tent to continue airflow along with the exaust.