The size and shape (and number!) of your pots-- and how and when you water-- also influence how much moisture your grow puts back into the air. Those conditions can be maintained or modified by your circulation and ventilation equipment. :weedpoke:

This discussion is really about 'relative' humidity. When your lights come on and the air warms, you move away from the "dew point" and your relative humidity will drops, even with the same total amount of water in your atmosphere--warm air can support more moisture than cold air.

Cold water, OTOH, can support more dissolved oxygen than warmer water. (These separate issues seem to be causing some confusion lately.):rastasmoke: