LED GLH Spectra 180 x 4 - 720 watt LED SCROG

Well, I might be interested should it come to that!
I think your temps are ok personally, mess with your height like your doing. Sometimes it takes several days to shake off stress.

anotherdaymusic said:

whats the distance? over 12'' ?

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They were at about 12-15, not they're at about 20-24. Leaves are curling up and browning, looks identical to heat stress but there may also be some bleaching going on here. I was told there are issues with these lights and their height requirements would be much greater than what is normal for LED. I have a friend running a single unit without any stress at all at about 6-8". (4) of them together is a different story evidently.

The issue here is not running LEDs. You are running 4 units, each with their own heating elements and fans. If you combined all 4 units into one unit, I bet your temps would be very low. Also, the exhaust of all your lights are hitting each other. If you spread them apart, and had one fan blowing on them, your temps might be a little more under control man.

Bubble Gum is the plant showing bud development on the left , smaller plant. White Widow is the plant showing little to nothing, larger plant on the right. Need to either drop the screen or start lollipoppin heavy on the WW here pretty quickly, she did not stretch as much as I though she would.

brokenturtle3102 said:

The issue here is not running LEDs. You are running 4 units, each with their own heating elements and fans. If you combined all 4 units into one unit, I bet your temps would be very low. Also, the exhaust of all your lights are hitting each other. If you spread them apart, and had one fan blowing on them, your temps might be a little more under control man.

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I can relate to what you're saying to a degree, however I'm moving the air from the top where the fans are pushing the heat. These 4 individual units should not have any more heat issue than a large 500w unit. I seriously considered a 500w but I stayed far away from the 500w units because there were even bigger issues with those. I don't feel as if heat should be a problem at 82 degrees at the canopy, certainly not out of control, and honestly right where I want it. I don't want to drop under where I'm at because the Co2 will be less beneficial. The heat is fine, I'm guessing its the footprint of the heat that is too intense? Hell if I know, but these lights have a curve that's for sure. I run my HID 600 at 12" - 82-86F and crank out dank with minimal stress. I ran the temps lower prior to running Co2 though.

These girls get the exact same feedings as my 600 plants which look great, do you LED growers notice that your plants use more or less of certain macros? It could be a nutrient deficiency but I don't see how it would only effect the LED tent. They look even worse in the pictures lol. This is not as much fun as I had hoped it would be.

hmmm.. if theres a little bleaching going on, move em up a lil more, unless you just moved em in the 20"s

The pics of the leaves deffinetely look like bleaching. Thats what a bleached leaf looks like anyways. What bleaching does is dehydrate the part of the leaf getting hit with the most concentrated light, and I guess the 85 degree air is making the dehydrated leaf turn crispy, which leads to dryness. It makes sense.

anotherdaymusic said:

hmmm.. if theres a little bleaching going on, move em up a lil more, unless you just moved em in the 20"s

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Thanks man, yeah they're above 20" but the damage is done. I'm hoping someone can help telling me what's going on. Its not what I picture bleaching to be, but they're definitely sick, very similar to the PPP plant.

brokenturtle3102 said:

The pics of the leaves deffinetely look like bleaching. Thats what a bleached leaf looks like anyways. What bleaching does is dehydrate the part of the leaf getting hit with the most concentrated light, and I guess the 85 degree air is making the dehydrated leaf turn crispy, which leads to dryness. It makes sense.

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That would make sense, my humidity is at 42-45% too. I'm just going to rock these things as high as I can get them I guess lol. I'm afraid I've done a fair amount of damage yet again. These lights are kicking my ass!

Thanks for the help fellow enthusiasts!

Shwagbag said:

I can relate to what you're saying to a degree, however I'm moving the air from the top where the fans are pushing the heat. These 4 individual units should not have any more heat issue than a large 500w unit. I seriously considered a 500w but I stayed far away from the 500w units because there were even bigger issues with those. I don't feel as if heat should be a problem at 82 degrees at the canopy, certainly not out of control, and honestly right where I want it. I don't want to drop under where I'm at because the Co2 will be less beneficial. The heat is fine, I'm guessing its the footprint of the heat that is too intense? Hell if I know, but these lights have a curve that's for sure. I run my HID 600 at 12" - 82-86F and crank out dank with minimal stress. I ran the temps lower prior to running Co2 though.

These girls get the exact same feedings as my 600 plants which look great, do you LED growers notice that your plants use more or less of certain macros? It could be a nutrient deficiency but I don't see how it would only effect the LED tent. They look even worse in the pictures lol. This is not as much fun as I had hoped it would be.

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I tend to use more calmag under led. I also get leaves that look like that. I pull them off when more than 1/3 of the leaves are bad. I feel like adding extra calmag helps with the problem. It could be your spectras though, been seeing a lot more unimpressive results with those lights recently.

Looks bleached to me, remember you do have some bleed over from the core saturation so there is some extreme intensity multiplicity going on in there. Irish was saying you got to keep them really high when the intensity is up. Sounds like you have the headroom to keep them up, I remember he and stoney saying that instead of dropping the lights you should let them grow up to them to temper themselves to the light as they go.

colocowboy said:

Looks bleached to me, remember you do have some bleed over from the core saturation so there is some extreme intensity multiplicity going on in there. Irish was saying you got to keep them really high when the intensity is up. Sounds like you have the headroom to keep them up, I remember he and stoney saying that instead of dropping the lights you should let them grow up to them to temper themselves to the light as they go.

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Makes sense. Excessive node spacing and stretching seems unavoidable going that route, I'll just have to see what happens. Just going to raise them to the roof and let these crippled bitches finish. Spectras 2- Shwagbag 0. Lol

i've seen many of the led growers say cal mag is a must for LED grows but bumping up that humidity couldn't hurt

PrezDickie said:

i've seen many of the led growers say cal mag is a must for LED grows but bumping up that humidity couldn't hurt

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Thanks everyone, I will bump the RH up to 45-47%. Any higher than that and I feel the Co2 benefits would be reduced. The girls get cal mag @ 5 ml/gal 2 out of every 3 waterings whether they get food or not. I will try feeding every time with it and hope for the best. Right about now I'm thinking another 600 or a 1000 HID would suit me better in this tent.

On my second grow, still vegging with my 180, vegging at 15-22 inches. I believe it’s a fine line between proper calmag and to much. Too much creates much the same issue as none, at least that’s what i read. hope you are wrong about the GLH spectras, I have 2 180's I over paid for and one 290 w I believe the new pwr supply, plan on dropping them all on my 3 plants soon.

just read this whole thread. thanks for all the info. gonna keep reading. thinking of going to led in the future. gonna dip my toe in hydro first. keep up the good work

growboyno1 said:

just read this whole thread. thanks for all the info. gonna keep reading. thinking of going to led in the future. gonna dip my toe in hydro first. keep up the good work

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Thanks, not much good work here yet, hoping for better soon though.

Looking good, at least you found your sweet spot with the lights! Lets see these babies flower now

SmeLLyTreeZ said:

Looking good, at least you found your sweet spot with the lights! Lets see these babies flower now

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Haha, still no sweet spot. For the time being the sweet spot is as far away as possible lol.

Shwagbag said:

Haha, still no sweet spot. For the time being the sweet spot is as far away as possible lol.

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LoL, exactly!