Humidity question?

During flowering How high is to high for humidity?
Mines about 64 during the day but like 70 plus when the lights are off
I have tonnes of air movment tho and the planets look fine and only 4 days from harvest

Most ppl like 40%

you should maybe invest in a small dehumidifier. since ur that close to harvest maybe you'll be fine..

to much humidity can cause mold on the buds, and. "we no likey mold"

As Humbolt said, you are in greater danger of getting powdery mildew and/or bud rot compared to lower humidity. The chances of getting it depend on your strain, plant health and air movement, and also on the age of the plant. As the plant gets further into flowering it's immune system slows down and it becomes more susceptible to the fungi. Keep a close eye on your girls and pull 'em if theres any sign of mold or mildew since you're so close to being done. PM starts on the leaves if the lower branches, rot where there's crowding, stagnant air or really dense buds.