Any thoughts on these plants using this light setup?

So i'm growing 9 clones at the moment that i cut from my previous grow, strain is Gelat OG from seedsman.
Since 3 weeks, they re now 6,5 weeks old and are on day 11 12/12 with buds starting to form nicely.

I've already read that combining HPS and LED will work just fine and it sure seems like it. The only thing i;m wondering is what would be a good distance between my plant and the lights? I got experience with HPS with 400 watt being ideal around 35-40cm from the canopy but i have no experience with led.

Here are some pictures of my setup.



I'm using a 400 watt HPS and 2 Cree's 3590 4000k running at 36v 2.7A 97.2 watts with a total combined of 595 watts.

What would you guys recommend my ideal distance would be to start at? At the moment i have them at 60cm (23.6").
Plants are all topped and tied down to keep them at an even height. The biggest difference is just 2,5cm between the highest en lowest main cola's which i will also correct once they stop growing. As mentioned earlier i am now at DAY 11 of 12/12.

Look forward to hearing what you guys (or girls) think about what the best distance would be?

Greets and thanks in advance.

I use free app lux light meter (link below) on my android phone. The readings you get depend on your phone's hardware. I know with mine, I can veg at around 20000lux to 30000lux and I flower at 45000lux to 50000lux. Over 55000lux and the plants show signs of stress. I use a known good light value as a basis, and use that number as a starting "calibration" value. Your values might be different based on your hardware. Not as good as a true ppfd meter, but very helpful for me.

https://play.google.com/store/apps/details?id=com.doggoapps.luxlight

Tracker said:

I use free app lux light meter (link below) on my android phone. The readings you get depend on your phone's hardware. I know with mine, I can veg at around 20000lux to 30000lux and I flower at 45000lux to 50000lux. Over 55000lux and the plants show signs of stress. I use a known good light value as a basis, and use that number as a starting "calibration" value. Your values might be different based on your hardware. Not as good as a true ppfd meter, but very helpful for me.

https://play.google.com/store/apps/details?id=com.doggoapps.luxlight

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Thanks for the tip, I will give it a try tomorrow once the lights turn on again. I will be ordering a lux meter as well in a few days and hopefully it will arrive within a week and a half. Because it will take about 10 days it would be nice to get a general idea about the distance with these 3590's running at 97 watts each.

Plants look like they like what you’re doing.
No two plants grow identical, so it’s a trial an error thing.
I’m not against lux meters though I’ve never used one, but listen to your plants as you go along.
They’ll tell you more than any meter can.

Don't go by lux too much
because a 4000k LED will show a much higher LUX at say 12inches than a 3000k LED (I got 2700k,3000k,4000k, 3000k with reds,3500k with reds)


As the fellow above said, listen to your plants.
I put mine pretty close (mainly to prevent popcorn buds) but not so close that there's too much hotspots and the buds look like it's glowing (actually i do sometimes).

drsaltzman said:

No two plants grow identical, so it’s a trial an error thing.

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Thanks
I am using clones from the same mother plant i grew before so they are all pretty identical in height and how they grow. That's ones of the reasons i always prefer using clones.

goofy81 said:

Don't go by lux too much
because a 4000k LED will show a much higher LUX at say 12inches than a 3000k LED (I got 2700k,3000k,4000k, 3000k with reds,3500k with reds)


As the fellow above said, listen to your plants.
I put mine pretty close (mainly to prevent popcorn buds) but not so close that there's too much hotspots and the buds look like it's glowing (actually i do sometimes).

Click to expand...

With lux you are probably right, i just started using them so i still have a lot to learn and i'm grateful for anyone trying to help out.

I won't have to much issues with popcorn buds seeing my plants are just 25cm tall because after topping them i tie everything down to an equal height just like using a SCROG i just have a bit more work on them but i love it and i like to take care of them as if they we're my own children really
The difference between the upper and lower buds are a maximum of about 12 cm and the even lower ones i already pruned away once i started 12/12 so usually all my buds will turn out to be like rocks even tho they are a bit smaller in size of course.

They are at 60 cm now and i will be lowering them to 50cm today and hopefully they won't have any stress.

Does you guys know how long it could take for light stress signs to appear so i can keep an eye on that?

GrowingAbroad said:

Thanks
I am using clones from the same mother plant i grew before so they are all pretty identical in height and how they grow. That's ones of the reasons i always prefer using clones.

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Reminds me of the Rocket Mortgage commercials.
Not sure if you're in the US being as you use cm's for measurement, but here it is:

I;mf

drsaltzman said:

Reminds me of the Rocket Mortgage commercials.
Not sure if you're in the US being as you use cm's for measurement, but here it is:

Rocket Mortgage Super Bowl 2021 TV Spot, 'Certain Is Better' Featuring Tracy Morgan, Dave Bautista

In a Big Game spot, a family is touring a house they are "pretty sure" they can afford when they are surprised to find actor Tracy Morgan lounging in the bath. He warns them against betting on being "pretty sure" in a variety of high stakes scenarios. For example, you want to be more than...

www.ispot.tv

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I'm from The Netherlands originally but i've been living in Turkey for the past 7,5 years
I love those kind of commercials. At least once in a while they really make you laugh like this one
Almost pissing my pants laughing. Hi Neighbor.... i'll hold the dog whahahaha

GrowingAbroad said:

Thanks
I am using clones from the same mother plant i grew before so they are all pretty identical in height and how they grow. That's ones of the reasons i always prefer using clones.


With lux you are probably right, i just started using them so i still have a lot to learn and i'm grateful for anyone trying to help out.

I won't have to much issues with popcorn buds seeing my plants are just 25cm tall because after topping them i tie everything down to an equal height just like using a SCROG i just have a bit more work on them but i love it and i like to take care of them as if they we're my own children really
The difference between the upper and lower buds are a maximum of about 12 cm and the even lower ones i already pruned away once i started 12/12 so usually all my buds will turn out to be like rocks even tho they are a bit smaller in size of course.

They are at 60 cm now and i will be lowering them to 50cm today and hopefully they won't have any stress.

Does you guys know how long it could take for light stress signs to appear so i can keep an eye on that?

Click to expand...

I've had a plant that was bleached for like over 1 week! Was the entire plant and was light green. Couldn't figure it out because i had just gotten these leds (my first lm301s) and it was my first time using a certain strain.

I dimmed down to 40% for a few days and they were still bleached.Eventually I raised the leds and turned a few panels off and they all slowly became vibrant green again. So the leaves can heal from light stress if it's not too the extreme.

I also had a feeling that it was something to do with the cold temperatures.As i raised the heat,I notice the plant could take on more light.