Stephenj37826
Well-Known Member
Low transperation for the amount of photosynthesis...... Lots of deficiencies. 81 or so seems to be really nice. Extra Mag is always helpful as well.
HLG550 vs Gavita? Anyone with experience with either/both?
- Thread starter kdt15
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CobKits
Well-Known Member
if the light from 600W of HPS is what your tent needs you can get that same amount of light with 400W of LED, which will create less heat. You'll also want to run higher temperatures with LED so theat offsets your cooling needs
yeah that would be 85 g/SF and over 2 g/W which i dont want to say is unattainable but youd have to have every single thing work for you. long veg time+ massive training/supercropping/defol + the right strain done exactly perfectly by a master grower... you might get close to that
average joe in a 4x4 it would be pretty unlikely
Evil-Mobo
Well-Known Member
Seeing no issues running low 70's and using LED lights
Humple
Well-Known Member
Slower growth, deficiencies, generally shittyness.
Evil-Mobo
Well-Known Member
Interesting. Seen none of that running low 70's for temps.
Humple
Well-Known Member
Your results seem to be more the exception than the rule. May be down to genetics.
Evil-Mobo
Well-Known Member
5 different strains in this space .........
ANC
Well-Known Member
I think it depends a lot on how many plants you have in the room.
If you have a low number in a room, they can transpire as much as they want without running into very moist air.
If you have a room full of girls they are going to sweat about a gallon per square meter a day.
If you have a low number in a room, they can transpire as much as they want without running into very moist air.
If you have a room full of girls they are going to sweat about a gallon per square meter a day.
Humple
Well-Known Member
And I've seen major problems and struggling plants under 80. Goes to show that what works for one should not be assumed to work for another; still, the majority here seem to concur on higher temps being needful. Regardless, it's certainly something that people new to LEDs should consider and watch out for.
Humple
Well-Known Member
I have one strain that shrugs off the low temps. The rest have a rough time. Again, no one person's experience is definitive, but this is a common observation from a number of growers, so it's worth noting.
I wouldn't expect you to see issues at 70 but I would think you would see an increase in growth if you got closer to 80 assuming you up the water/nutrients
Moflow
Well-Known Member
Unless you're me......
Evil-Mobo
Well-Known Member
Didn't GML mention lack of frost at higher temps with the LED's? Saying he wished he would have ran lower temps?
Stephenj37826
Well-Known Member
Lack of frost was from overwatering and too high RH. High 70s and low 80s humidity is not good. It's proven running lower RH increases frost. I imagine the opposite would be true in an opposing situation.
The HPS side has been 50-60% vs 75-85%.
Evil-Mobo
Well-Known Member
Gotcha this current run I'm in the low to mid 70's and the RH stays in the 50-60% range. So i guess basically I've been running hps temps and humidity and feeding lower than usual but more often and the plants are rocking it.
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a mongo frog
Well-Known Member
Lower temps often times make for a colder root system. Then that has whole set of problems that come with that. Pretty sure thats what you are getting at.
Johnnycannaseed1
Well-Known Member
Not to mention he could run into trouble with mold having an RH that high, that late into flowering. All good though because he will know for next time what he needs to do, to better dial in his grow on the next run. And folk watching get to see how to avoid the pitfalls so it is a win/win for everyone.
Low temps, from my experience, = metabolic slowdown = slower rate of growth.
I have not met a canna plant that liked low temps, but I am sure they probably exist
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hybridway2
Amare Shill
I've been running the HLG ELITE 650-700w & 1000w HPS in the same room for going on 3 grows now if anyone has a question I may be able to help.