there is no exchange of co2 and o2 during lights off, if you want to have lushush green plants 70% humidity vegg and decress to 40% in flower. We all know there is alot of humidity in the summer and the second fall comes it drops. also its more humid on a summer day then a summer night.
JackdaWack Reviewed by JackdaWack on . humidity :thumbsup: during the light`s on (18/6) my humidity is 55 - 70%.....what humidity level do I keep during the light`s off cycle ? flood & drain sys whit clone in veg ! :smokin: Rating: 5