LED temps

Jcann

Member
I’m new to growing, but am very excited. I’ve been doing a lot of research and decided to use LED but am finding some conflicting info on temps but this seems to be the most intelligent article I’ve found thus far...

“When a leaf absorbs IR, it heats the leaf creating actual leaf temperatures of 5-7 degrees higher than the 78F degree air temperature. Thus with light sources rich in IR, an air temp of 78F is functionally 83F-85F to the plants metabolism. LED’s emit no IR, so to achieve similar metabolic rates found in HID or greenhouse conditions at 78F air temp,LED growers need to run the room air temp at 83F-85F. Air temp can also be lowered by 3F-5F in the last 2 weeks of flower to enhance ripening, but remember as relative humidity goes up the air temps go down, so be prepared to make adjustments accordingly.”

so reading this, would it be accurate to adjust my temp on my 5 in seedlings with 2 sets of leaves to 83 deg F?

thanks in advance
 

saintmetalhead

Well-Known Member
Im going to say this right out the bat, those numbers are pretty unique to that individual's situation, what I would do is get your temps at a normal state around 70-75ºF and around 50% humidity, those are good numbers to start with, much higher you can start to run into some weirdness that will look like deficiencies and what not so what I would do is start there and adjust accordingly, LED's are great and some LED's do put off some IR and UV light. full spectrum panels and yes it can cause more heat. But inside heat is an enemy. you don't want to much and you don't want too little, each strain... sorry each PHENO will tell you what it wants. sorry its a little TLDR but I wouldn't go crazy at this stage your going to melt your brain with advanced stuff when you're just learning. My 2 cents I'm sure people will disagree with me but hey that's why we're human!
 

diggs99

Well-Known Member
My led room runs on controllers, set at 84.5 f and the rh set at 60-70% until late flower.... I would aim to keep temps on the 80s at the very least.

I’m not using co2, the plants just like warming temps under led.

I’m also using proper leds, not old tech blurples or cheap stuff for amazon.
 

SBBCal

Well-Known Member
Does anyone have a thread or link to more info on this? I’m running 3 -p1500 led’s w/ temp 78-80 and have read more conflicting reports than actual proof that running QB’s-LED (NOT BURPLE) need to have ambient/room temp to be 83-85. Thanks
 
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