To dim or not to dim?

GrowingWithTheFlow · May 13, 2020

Light is a HLG300 QB pulling 285w from the wall at 100%. 2.5x3 Scrog. Fox Farm soil and trio nutes. NLxBB from WOS. All the girls are lush and happy. Entering week 3 of flower.

Last night the grow peaked at 87F. So now I wonder if I should dim the light to perhaps drop the temps a bit? Am I better off with a little less light to get temps down? Or do I power ahead until the girls show adverse effects from heat? Thanks in advance!

Aqua Man · May 13, 2020

GrowingWithTheFlow said:
Light is a HLG300 QB pulling 285w from the wall at 100%. 2.5x3 Scrog. Fox Farm soil and trio nutes. NLxBB from WOS. All the girls are lush and happy. Entering week 3 of flower.

Last night the grow peaked at 87F. So now I wonder if I should dim the light to perhaps drop the temps a bit? Am I better off with a little less light to get temps down? Or do I power ahead until the girls show adverse effects from heat? Thanks in advance!

Leaf temps matter not ambient. Use an IR temp gun and shoot for 75-83f leaf temps

It's not uncommon for led to run those room temps if that helps

GrowingWithTheFlow · May 13, 2020

Aqua Man said:
Leaf temps matter not ambient. Use an IR temp gun and shoot for 75-83f leaf temps

It's not uncommon for led to run those room temps if that helps

Incredibly helpful. I’m assuming the next few weeks are critical and don’t wanna screw it up now! Thanks brother!

Aqua Man · May 13, 2020

GrowingWithTheFlow said:
Incredibly helpful. I’m assuming the next few weeks are critical and don’t wanna screw it up now! Thanks brother!

Anytime. If ya getting 40-65k lux your are in the prime flowering intensity. I use an app call light meter by my mobile tools dev. It's free and will get ya close. Not a super accurate meter but better than nothing for free

Beowuuulf · May 13, 2020

I suggest supplementing co2 if you can possibly. This will allow higher heat tolerance at around 1500ppm.. potential yields 10%+

Aqua Man · May 13, 2020

Beowuuulf said:
I suggest supplementing co2 if you can possibly. This will allow higher heat tolerance at around 1500ppm.. potential yields 10%+

Only if it's a very well sealed room or it going to be very wasteful.

GrowingWithTheFlow · May 13, 2020

Yeah, I think I’m moving too much air for CO2 to make sense. My closet is 96 cubic feet and I’m running a 190-ish cfm carbon filter. I’ll add a thermal gun to my kit, but I agree with Aqua Man that the leaf temps are probably much lower than air temps.

To dim or not to dim?

To dim or not to dim?

GrowingWithTheFlow

Aqua Man

GrowingWithTheFlow

Aqua Man

Beowuuulf

Aqua Man

GrowingWithTheFlow

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