Humidity issue

Doesn't make sense. light on 70% rh but lights off it drops to acceptable levels? That's not possible, the 10 degree drop in temps from lights off will increase humidity by default. Hmmmmm my brain slow on Fridays. I always found nighttime cellular respiration and the build up of humidity indoors to have far more of a moisture foot printcompared to transpiration give or take the same amount of water is moved but 98% of the water that is spit out at night doesn't come from the rootzones and medium, its plucked from oxygen in the air, why it's semi important to have a fresh air intake at night of oxygen to some degree. Without the latent heat to assist evaporation of moisture released by stomata, plant is fully dependent on airflow, temps and humidity, if left unchecked a 60-70% daytime goes to 80 within 45 min of light off without proper ventilation, at high rh evaporation becomes a struggle, oxygen becomes scarsce. As plants photosynthesize and use light energy to convert carbon dioxide and water into glucose and oxygen, they release water vapor into the air. This process, called transpiration, can contribute to an increase in humidity in the grow tent. Only maybe 10% of water is actually used for cooling and growth, roughly 90% of water that moves through a plant during the day is ejected Into the air, light can contribute to the evaporation of water, and this process involves latent heat. Your plant is possibly ejecting the water but there is not enough latent heat to assist with evaporating the moisture, leaving it to increase humidity. Light itself can evaporate water vapour without heat This phenomenon, called the "photomolecular effect". Water molecules are constantly in motion, and some will always have enough energy to break free from the liquid phase and enter the gas phase (water vapor). The higher the temperature, the more molecules will have this energy, and the faster the evaporation rate will be. Just make sure ventilation is going. The harder a plant transpires the more cooling it produces. When you set your ambient temperature, set it from top of the canopy, whatever temp you use for daytime add a few more degrees, 77-86. Plant will transpire 3x at 86F what it does at 68F. At 68F, some water molecules will still evaporate, At the higher temperature, a larger proportion of molecules have the energy to evaporate, leading to a much faster rate. Goodluck old buddy old chum!

Yo mate, at week 8 , 70% RH with lights on is way too high you’re flirting with bud rot, especially when bud gets chunky. What’s happening is your lights are warming up the tent, plants start sweating (transpiring) more, and all that moisture hangs in the air if your exhaust can’t keep up. First thing crank that Cloudline A4 to full during lights on, and make sure your passive intake’s open so you’re pulling in drier air. Add an extra clip fan or two to keep air moving through the plant and under it. If you can, switch your lights to run at night, ambient humidity’s usually lower then, so RH drops naturally. Get humidifier as your goal right now is under 50% RH, ideally closer to 40%. You’re nearly there, just need to dial this in so mold doesn’t screw you last minute 👊

Hey 👊 Ich stimme mouse zu. Das Licht zwingt die Pflanzen Fotosynthese zu betreiben, wodurch die Transpiration steigt. Vollkommen legitim. Versuch den umluftventilator stärker zu stellen. Sollte das nicht möglich sein, kannst du dir einen entfeuchtet ins Zelt stellen, um den Überschuss aufzufangen. Hoffe es hilft 👊🍀

lights on, plants breating and releaseing more humidity. Increese your air exchnage, problem solved.