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Old 11-20-2020, 12:14 AM #1
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Lightbulb Growing Under LEDs at Temps Above 80F

I've just eliminated the HPS lights from my grow room and am trying to determine if I should heat the space. A fellow grower who is all LED tells me I should crank the temp up to 80F plus. Anyone have any direct experience? Thanks
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Old 11-20-2020, 12:16 AM #2
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Don’t listen to that fellow grower. 72 to 80 is the ideal range.
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Old 11-20-2020, 12:21 AM #3
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Thanks! I've had a number of successful harvests under the LEDs while I had the HPS lights running in the room and the high temps weren't necessary. My friend claims that the LEDs don't throw IR light so the high temp is necessary to achieve the correct VPD. IDK!
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Old 11-20-2020, 12:39 AM #4
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Your friend is right, higher temps for led growing are ok. 28-30°C is a good environment for plants under leds, keep an eye on the humidity.



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Old 11-20-2020, 12:47 AM #5
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Your friend is right, higher temps for led growing are ok. 28-30°C is a good environment for plants under leds, keep an eye on the humidity.



Cheers

Thanks! Are the higher temps necessary? I just got into the season where my AC isn't running 24/7. I was hoping the room would heat itself with just the LEDs.
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Old 11-20-2020, 01:41 AM #6
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The range mentioned by Koondense is exactly where you will see peak performance. Light intensity, temperature and photosynthesis are very entangled, if it's 70 F and the plants see 1000 PPFD, that's a bigger problem than if they see 600 PPFD
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Old 11-20-2020, 01:59 AM #7
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Your friend is right, higher temps for led growing are ok. 28-30°C is a good environment for plants under leds, keep an eye on the humidity.
Cheers

Same here
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Old 11-20-2020, 02:01 AM #8
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“The best temperature range for indoor plants is 70 degrees F – 80 degrees F day and 65 degrees F – 70 degrees F night.”
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Old 11-20-2020, 02:01 AM #9
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The range mentioned by Koondense is exactly where you will see peak performance. Light intensity, temperature and photosynthesis are very entangled, if it's 70 F and the plants see 1000 PPFD, that's a bigger problem than if they see 600 PPFD

I've been keeping the room at 75F. I'm considering bringing it up to 81F. Do you think it's worth the extra energy to heat vit?
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Old 11-20-2020, 09:46 AM #10
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It is better to keep temp around 30C. Cannabis love this temp.
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