Facts!Personally, I doubt it, you're still within the "operating range", your chart is giving more detailed "ideal" levels but as long as you're not in or close to the red zones then the plant(s) should be happy enough.
What's more important is "how the plant(s) look" for if they look perky, happy, and are piling on the green bits then don't worry. If they look sad and depressed, then worry. They're hardy wee buggers, they can handle me, so if they look happy then why change anything now.
Thanks Bro, that help me a lot. I think I'll be good up until late flower, i'll be getting a dehumy for then.I have both a humidifier and a dehumidifier. I have a Pulse One sensor (whole thread here dedicated to it) that helps me keep in the green area of the more precise chart. Remember that that chart assumes a leaf temperature of 2°C less than the ambient air temperature. With my lights on the Leaf temperature is closer to 4°C lower than the air and there is another chart for that.
When I need to run the dehumidifier usually in late flower I have a 30 pint Frigidaire and it has to be emptied twice a day in a 10 x 11 room. I use the humidifier sometimes in early veg before the plants are big enough to respire enough water into the air.
Damn, the Pulse One looks the shit.. I got the SensorPush combo but it doesn't look like it does nearly as much as the Pulse