Reply To: The importance of good air circulation

[Somatek]

Increasing the ventilation during lights on is the easiest way to keep the temps more equal, having the driver for LED’s outside the grow is another way to reduce it or running a dehumidifier when lights go off will raise the night temp. A 10F drop isn’t horrible but much more and you hit the dew point which makes better conditions for pathogen growth, ideally having them closer together is the goal.

The difference between day and night temps also affects how much the internodes stretch, so controlling the day/night temp differential is another way to manage plant height.