This might be a bigger hoop house and looking at double walled and light dep covers. What would be an ideal and the lowest temp at night? I assume 70's is ideal.
I’m no expert. But I try to keep my temps between 60 - 85 But Mid-late summer keeping temps down is challenging. Mine can hit 100 with fans, sides up, misters going outside my air intake.
I have a dehumidifier but it doesn’t always get used.
Ideal is mid to upper 60s at night. In practice you can go far lower and bring out some nice colors (at expense of slower growth). Just depends on how much you are willing to pay to keep it warm.