Good light LED light ?(I currently have)

blueberrymilkshake

blueberrymilkshake

Well-Known Member
Sberarducci said:
I figured someone was going to ask me that ! Lol
I’m not sure I don’t have one in there I’ve been misting it through out the day tbh .. I have a humidifier tho ! Should I use it ?
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Depends how low your humidity and how high the humidifier will raise it. If you don't have a rh meter, you should get one.

It does look like it's a little dry though
 
Sberarducci

Sberarducci

Well-Known Member
jimihendrix1

jimihendrix1

Well-Known Member
OSBuds said:
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The science of photosynthesis, PAR and PPF for indoor cannabis. Our Grow Space Calculator shows the optimal light and harvest estimates for any grow space.
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I dont agree with their assessment

A 1000w HID has always been advertised as the industry standard for covering a 4 x 4 area. 62.5w Sq/ft. Thats been the standard since 1978, when HID for horticulture first came out.
A 600w HPS/Hortilux HPS is the most efficient SE 600w HPS I know of, and is advertised as covering a 3 x 3 area. Thats 66w sq/ft. 40w Sq/ft is way to low, especially for equatoral sativas where the light index is off the charts. Especially in Columbia, and Equador, and in the Andes mountains. UVA/B is also off the charts.
Along the coast of Equador the UVA/B index is over 20, and can approach 26 at noon on a sunny day where normally in USA the UV index goes to 10
At 20,000 feet in Equador the UV index has exceeded 40!!!! Though nothing grows there. But it shows you how powerful the light is.
Now HID lights have gotten more efficient, and have Single Ended HPS with added blue. This didnt happen until the 90s, and before that people usually used a Metal Halide, or combined MH/HPS.
The AVERAGE clear sky sun provides around 893 Watts/m2(which is about 283.6 Btu/ft2/hr or very close to 100 Watts per square foot). Notice that this number is an AVERAGE value.

At the equator it can approach 1400w Sq/m. Even more at high altitude on a clear day.

A Gavita 1700e is also advertised as covering a 4 x 4 area at 645w, and 1781 umol. A 1000w Hortilux HPS is 1690umol after a 1 month break in. SE HID loses 10% the first month. At 645w the Gavita 1700e is 40.3w Sq/ft, and 1781umol , of course it less umol at 18-24 inches as is the HID.

Thing is about using all this power is that you either have to have CO2 enrichment, or constant huge fresh air exchange. I agree with their assessment if CO2 enrichment, or fresh air flow is not optimal.

But the sun can be 126w Sq/ft at the equator on a sunny day.

Ive used a 1000w HID for seedlings since 1977-78. I figure they get blasted outside/equator on a clear day, and I give then no less inside.
 
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blueberrymilkshake

blueberrymilkshake

Well-Known Member
Sberarducci

Sberarducci

Well-Known Member
blueberrymilkshake said:
It's hard to quantify how much your equipment will change the environment without first knowing the environment. Purple stems can mean a few things. Gotta know your current conditions first though
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It’s in a closet in my spare bedroom i live ins condo, I am on the bottom floor (basement ) the plant sits with a long room fan facing out the closet to bring out heat. It sits about 26 inches from the light itself. I mist it through out the day (as I stated before) & that’s really about it !
 
dizzygirlio

dizzygirlio

Well-Known Member
Note: I'm no expert, but I was wondering about your airflow in that closet? Like do you have a little fan in there circulating air? I don't know what your temps are at in the closet, but I know that my plants like air circulating gently. If I have too much humidity and not enough circulation my leaves can look like that. Another thing I was wondering is does your soil have perlite or something to help with drainage? I've found that if the roots can't get air flow or there's not enough drainage then it could cause them to look like that too. This has been my experience anyway so I thought I would share.
 
Sberarducci

Sberarducci

Well-Known Member
dizzygirlio said:
Note: I'm no expert, but I was wondering about your airflow in that closet? Like do you have a little fan in there circulating air? I don't know what your temps are at in the closet, but I know that my plants like air circulating gently. If I have too much humidity and not enough circulation my leaves can look like that. Another thing I was wondering is does your soil have perlite or something to help with drainage? I've found that if the roots can't get air flow or there's not enough drainage then it could cause them to look like that too. This has been my experience anyway so I thought I would share.
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I do have a fan in there. ( I put pictures in a comment above how it’s set up ! I was reading into something’s about air flow in there I poked holes in the soil like it suggest for now until I can get my and a on some perlite might do it when I do my final repot into it’s bigger pot. But for thermostat it comes tomorrow so I guess we’ll see this is all still a learning process for me !
 
Rookieoftheyr

Rookieoftheyr

Well-Known Member
Sberarducci said:
I do have a fan in there. ( I put pictures in a comment above how it’s set up ! I was reading into something’s about air flow in there I poked holes in the soil like it suggest for now until I can get my and a on some perlite might do it when I do my final repot into it’s bigger pot. But for thermostat it comes tomorrow so I guess we’ll see this is all still a learning process for me !
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It seems like it never stops when it comes to buying stuff. Then one day it’ll stop. Keep marching on. Once you know temp and humidity then you gotta figure out what measure you need to take to get in the sweet spot. Then the seasons change and shit goes opposite lol. Good luck hope you do well. I’m constantly learning.
 
Sberarducci

Sberarducci

Well-Known Member
Rookieoftheyr said:
It seems like it never stops when it comes to buying stuff. Then one day it’ll stop. Keep marching on. Once you know temp and humidity then you gotta figure out what measure you need to take to get in the sweet spot. Then the seasons change and shit goes opposite lol. Good luck hope you do well. I’m constantly learning.
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Ughh it’s such a pain in the ass lol not sure if I’ll grow again after this one maybe I’ll just stick with my house plants :-o it’s just sucks cause I’m a CTMMP so I find all the good seeds EVERYTIME. But yeah learn everyday ! It is fun & interestingmost of the people on here are great help also.
 
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