I just stumbled across this article that California Lights has on their website. I am concerned about the heat levels inside my grow space (4×4×8 tent) i am struggling to keep it at 78° but, this article is claiming that since i am using LEDs instead of Sodium Halides that i should run the temp at 83°- 85° because LEDs do not produce Infra-red and that the surface of the leaves are a 4-7 degrees offset and will be too cool with air temps of 78°. What should i do, raise my air temps to achieve or make up for the offset?
Heres the paragraph I’m talking about. Any intel will be appreciated. Thanks
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I run LED’s and try for 78F but don’t get concerned until temps get over 83F. I find that I get a better terpene profile at the lower temps.
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Thank you and a very true statement from my observations from my first grows harvest. I noticed, even during the drying phase that there wasn’t much odor. Still not much odor at 3 weeks into cure. This is because my temps were in the upper 80’s throught lights on the entire flowering phase. So, this grow, my 2nd attempt, i understand now how important it is to keep the temps below the 85°threshold. I mean way below. I am not letting it get above 82° this time. Your darned right when you say the terpenes are better at 78°…
@Myfriendis410
Is it a little different in veg? Is it okay if its a little hotter in veg so that i can save on power consumption a little? Can i run veg a little higher than 80 to 82 degrees?
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I don’t worry about temps in veg. Especially with a 16 or 18 hour day. I’m in a dry climate and it’s almost ideal environment in my grow room in the basement. Due to the high elevation and dry climate I don’t have to worry nearly as much about WPM either. So normally I run around 60% RH in flower until the last couple of weeks: then I run a dehumidifier.
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So, i can back off on the AC for right now and it won’t hurt them? It gets up above 86 degrees without it…will it be fine? The humidity is around 60% give or take 5%
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During veg you should be fine.
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Thank you! They’re still seedlings just hitting veg…right now…
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@MartyMarajuanaseed my veg room will get up to 86 sometimes, it doesnt bother em a bit. Just keep a check on needing water…
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Okay great! I cut the air off and it rose to 87 pretty fast and hovered around 88-89 degrees.
I’m running 2 lights in a 4×4×8 tent, the HLG 320 Rspec FR and 700 Rspec FR at about 50 percent on the dimmer. I am around 4 feet from the canopy. Sound about right?
@ChittyChittyBangin
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@Myfriendis410 @ChittyChittyBangin
Hey, i just want to thank both of you for the intel. This is going to save me money in the long run. Not only this but i can save my equipment some running time so i can really nail it come flower in a month or so from now. My last grows harvest suffered heat stroke, i lost all my terpenes. I was getting a burnt rubber odor at first and couldn’t figure out why. I have very faint smelling flower from it. Live an learn… but, i am ready this run. I just ran my new AC unit for the past week and was holding it at 78° 60-70%rh during lights on. At least i have a good understanding of how its going to operate now.
I might have to delete the humidity come flower but, its not going to be an issue. My lung room stays around 35- 45% rh in the winter.
So if you wonder what buds would smell like from being under too much heat, thats it, a burnt smell mixed with old rubber thats been kept in a humid climate for 30 years…lol
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How large is the area
4×4×8ft
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Have you tried dimming your light and lowering it or is that going to mess up your spread?
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No, i guess i could drop it lower but i am pretty close now. Then i could dim them lower so they dont run so warm. I got you…
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@ChittyChittyBangin
Thanks, becamy frame of thought was, by having them higher up about 5 feet away that, that would keep the canopys at a decent temp but its the opposite. I just dropped them another good 2 feet and have the lights dimmed to about 45%. Temp got up to 92 degrees before. Now its lioking luke its rounding off near 87 at least. It got hot in there!
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Ive got mine cranked right now and they are as high as theyll go… im trying to cover a 12x8 though. Just a few more weeks! Plus temps are supposed to dive next week thank jeebus
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Yes, i am counting on that too… temps are dropping. Yaahoo…yeah, i just have to learn how to work my lights better. Its like anything else. Theres a meathod to using these LEDs with a dimmer. They can be manipulated to fit your personal grows space…
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Time to get an IR temp gun. Look for around 93 efficacy or adjustable, or at least know what it is & do the conversion.
You can check your leaf temps & calculate your leaf temperature offset, monitor your bud temps, make meaningful VPD calculations, etc…
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