For me ventilation is always a topic I feel is overlooked and not talked about enough. Alot of growers focus solely on light and nutrients and forgo right ventilation. Temp,RH, air movement, and ventilation all have to be working with each Other to have a ideal grow. I still struggle with it trying to keep it in the best medium range for all my plants at all stages of growth. I aim for 75-80 degrees with 60 % RH. But at the same time suck out and bring in 400cfm of fresh air. It's a pain in the ads. Environment controllers help. I make my own bc of how ridicules they are priced.