This might be a basic question but are the daytime and nighttime humidity supposed to be same?Give me an example of veg and flower.
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Assuming your temp drops during lights off, the RH should drop too. Check out these VPD charts for the optimal RH according to your temperature for the different stages of growth: https://pulsegrow.com/blogs/learn/vpd-charts-in-fahrenheit-and-celsius-with-leaf-temperature