Yup, my IR thermometer is great for checking surface temps. In this case he was talking ambient air temp. The video is Maximizing Cannabis Yields w/ Dr Bruce Bugbee, posted by Apogee, 47.09 minutes. He does speak briefly on root zone temp also.
I kinda knew that he was only talking about air temp.
What I was getting at is that asking what temp people run their room at, or who runs theirs at above a certain temp, doesn't seem to be enough info anymore (in my opinion). The only reason we even bring up temp (air temp) is because it related to the actual plants temp.
And you can't really accurately calculate VPD without the plant's/leaf surface temp.
If people respond with "I run my room at 'x' temp", or "above 'x' temp", and don't also say what the leaf/plant temp is...it can be (unintentionally) misleading. Even if they say what type of light they're using, though that's definitely useful.
I think we should be asking what temp do you run your... plants at, haha, if that makes sense. The follow up would be "how do you run your room in order to achieve that plant temp?" or something.
I guess I'm just ranting now..
To answer your question though, yes, I do. If I'm running led, I'm always trying to be 80
minimum - preferably 82-88. But depending on the rest of the environment, and it's really based on what's required to get the actual plant; the leaf surface temp is say...80*F.
Usually, the leaf temps are 4-5* lower than the ambient air. So 80* air temp just doesn't cut it. But that's for my current/previous environment. Nearing the end though, I'd want the plant (and air) to be cooler, for reasons mentioned; terps, etc.
Hope some of that is remotely useful, hah.
Edit: Oh, as a result (of warmer/sufficient plant temps) I see more growth - rate and mass, for sure. Higher metabolism, etc.
