LED dimmed to 25%

Fish scale · Jul 11, 2023

Hi guys, I have had my LED light dimmed to 25% for the last 2 or 3 weeks, when should I turn it up to 50%? It's a Lumatek Zeus Pro and it's about 20 inches away from the plants, should I turn it up to 50% and raise the light up a bit? Because I'm kind of confused when I should do it. Any help would be appreciated :weed:

TCH · Jul 11, 2023

Is the plant reaching for the light? Pics help tremendously when asking for help.

Fish scale · Jul 11, 2023

TCH said:
Is the plant reaching for the light? Pics help tremendously when asking for help.

I will go and take a few photo's now dude

Fish scale · Jul 11, 2023

I'm guessing I should turn it up to 50% seeming as they are pretty small for 3 weeks old? The leaves are curling up slightly and I'm guessing this strain doesn't like too much heat? Anymore than 25c and it hates it

Moflow · Jul 11, 2023

Is the light 600 watts?
Your plant is quite small. It looks slightly stressed.
I wouldn't be turning the light up just yet.
You are only going to be wasting energy/money.
I'd keep it at 25% for now and raise the light to 24" away and see if it perks up a bit.
Hope that helps.
I can't find much info on par maps for the light, only when running it on full blast.

That's for running in flower.
You'd think they'd give you par maps for each increment on the switch. It would make it so much easier for growers.

TCH · Jul 11, 2023

These were yesterday at day 21 from sprout so at the end of week 3. They are in coco though so that does make a difference. But yeah, I think yours is a little small. Do you have a way to get the temp down if you turn the light up?

Fish scale · Jul 11, 2023

Moflow said:
Is the light 600 watts?
Your plant is quite small. It looks slightly stressed.
I wouldn't be turning the light up just yet.
You are only going to be wasting energy/money.
I'd keep it at 25% for now and raise the light to 24" away and see if it perks up a bit.
Hope that helps.
I can't find much info on par maps for the light, only when running it on full blast.
View attachment 5307283
That's for running in flower.
You'd think they'd give you par maps for each increment on the switch. It would make it so much easier for growers.

It's the 465 watt version that I have.

I found some info on there website that recommends you to keep them 40 inches away to start with but that made them stretch like crazy when they were seedlings so I lowered it to 20 inches away and they have been fine since.

Yeah it's kind of stupid that they don't have any par maps for each stage. Thanks for the info anyway dude :weed:

TCH · Jul 11, 2023

Fish scale said:
It's the 465 watt version that I have.

I found some info on there website that recommends you to keep them 40 inches away to start with but that made them stretch like crazy when they were seedlings so I lowered it to 20 inches away and they have been fine since.

Yeah it's kind of stupid that they don't have any par maps for each stage. Thanks for the info anyway dude

Par maps are only good for so much and there are so many different variables that having a precise par map for every stage wouldn't be feasible. That said, maybe split the difference and try the light at 30" to mitigate the heat issue.

Fish scale · Jul 11, 2023

TCH said:
These were yesterday at day 21 from sprout so at the end of week 3. They are in coco though so that does make a difference. But yeah, I think yours is a little small. Do you have a way to get the temp down if you turn the light up?

View attachment 5307285 View attachment 5307286

Mine are in coco as well dude, that's why I was thinking to turn the light up to 50% because mine look really small for nearly 3 weeks old

Fish scale · Jul 11, 2023

TCH said:
Par maps are only good for so much and there are so many different variables that having a precise par map for every stage wouldn't be feasible. That said, maybe split the difference and try the light at 30" to mitigate the heat issue.

They have been okay for the last few days, it was the heat outside that was causing the temps to rise in the tent but it's only 20c outside today, the last few weeks it was nearly 30c outside so I think that is what was causing the heat issues if that makes sense?

TCH · Jul 11, 2023

What feed are you using? How often are you feeding? Ec/ppm? Ph?

Fish scale · Jul 11, 2023

TCH said:
What feed are you using? How often are you feeding? Ec/ppm? Ph?

The coco is pre charged. I'm using plain tap water because the coco is pre charged with nutrients. It's going in to the plant pot at 0.6 EC and coming out the bottom at 0.6 EC so it's coming out exactly the same as it's going in. The PH is 6.0

TCH · Jul 11, 2023

Fish scale said:
The coco is pre charged. I'm using plain tap water because the coco is pre charged with nutrients. It's going in to the plant pot at 0.6 EC and coming out the bottom at 0.6 EC so it's coming out exactly the same as it's going in. The PH is 6.0

Precharged with nutrients? Or prewashed and buffered? I'm not familiar with coco with nutes in it. How often are you watering it?

Fish scale · Jul 11, 2023

TCH said:
Precharged with nutrients? Or prewashed and buffered? I'm not familiar with coco with nutes in it. How often are you watering it?

Precharged with nutrients. I haven't used this brand of coco before and I didn't know it was precharged until I overfed them about a week or so ago. I'm watering daily until run off

Fish scale · Jul 11, 2023

I'm guessing there isn't enough light and that's why they are so small? I'm going to raise the light to about 25 - 30 inches and turn it up to 50% and see how they get along for the next few days?

Moflow · Jul 11, 2023

Fish scale said:
I'm guessing I should turn it up to 50% seeming as they are pretty small for 3 weeks old? The leaves are curling up slightly and I'm guessing this strain doesn't like too much heat? Anymore than 25c and it hates it

Whereabouts are you taking the temp reading from?

Fish scale · Jul 11, 2023

Moflow said:
Whereabouts are you taking the temp reading from?

On the floor I've got a hygrometer and I've got a inkbird sensor dude

Moflow · Jul 11, 2023

Fish scale said:
I'm guessing there isn't enough light and that's why they are so small? I'm going to raise the light to about 25 - 30 inches and turn it up to 50% and see how they get along for the next few days?

You'd be surprised how much light it's getting for such low wattage.
Maybe download a light meter app. That'll give you a ball park figure.

PopAndSonGrows · Jul 11, 2023

TCH said:
These were yesterday at day 21 from sprout so at the end of week 3. They are in coco though so that does make a difference. But yeah, I think yours is a little small. Do you have a way to get the temp down if you turn the light up?

View attachment 5307285 View attachment 5307286

KILLER growth rate, man

Fish scale · Jul 11, 2023

Moflow said:
You'd be surprised how much light it's getting for such low wattage.
Maybe download a light meter app. That'll give you a ball park figure.

I turned it up to 50% and raised the light. It's between 350 ppfd and 380 ppfd. Between 2 and 3 weeks old

LED dimmed to 25%

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