Hi
Im roughly 10 days from chopping my first grow. Im struggling with heat and im worried about up coming drying.
But before the drying, which is going to be challenging with this heat/humidity, I'm wondering about my vpd.

Lights on im running 26.5 - 27.5c. That is with the light driver outside of the tent, light on 55% power (mars hydro fc6500 in a 4x4).
I can get lights on vpd to 1.2 - 1.5.

Lights out i have to keep it minimum 24c, but even that struggles to get me 1.20vpd.
I have a hydrone 5 on full blast constantly in the tent which lowets some humidity, but causes lots of heat.
If I add another dehumidifier to the lung room, it gets way too hot.
So I exhaust down the stairs and have a dehumidifier downstairs to collect the moisture.
My weather humidity outside high can be 97% and low around 55% according to the weather.
I have 3 oscillating fans, an intake inline on low and an exhaust inline on between 6 - 10 power.

Im worried about mould as some buds are pretty big and some stuff touches each other, despite loads of yo yos and plant wire holding stuff apart.

How do you deal with temp, humidity and vpd?
I want Lights of temp and humidity to be lower, but Its impossible.