Lighting Anyone got any pictures of autocob light stress in action?

[AutoWonders]

Look at all the quality light stress I’m getting on these buds with the AutoCob 6 inches away with a reflector.

Fan-Friggin'-Tastic. Love to see that info. My lowest for current run is 15" and will continue to go a little lower if all stands up well enough. I realy like how my plants are growing....letting them grow to the Autocobs. You've got some tasty looking buds. Enjoy!

 

[HemiSync]

Fan-Friggin'-Tastic. Love to see that info. My lowest for current run is 15" and will continue to go a little lower if all stands up well enough. I realy like how my plants are growing....letting them grow to the Autocobs. You've got some tasty looking buds. Enjoy!

I’m amazed! The buds are just oozing resin to protect themseIves. I did not start this grow on AutoCobs, only switched at the flip to flower so it has been a learning experience. My next grow has already been started and the cob has been on the seedlings since they broke out of the dirt at only 16 inches away from it and now are even closer to it. I’m curious how much you can condition a plant to the COB. Here is my momma tent with multiple mothers, several 2 liters bottle grows, and a few clones way in the back. The tent is only 3 feet high so you can see just how close the AutoCob is to everyone.

 

[_RedACD_]

New guy here. I'm using a 2x4x4 tent and am pushing the height limits. I'm currently growing a Mephisto Chemdogging and a MBAP. Both are close to 3 feet and don't leave much room for the lights.

Chemdogging on the left and MBAP on the right. The MBAP is about 34" and is sitting between about 6 inches offset from the Cobs. So far, everything seems to be fine. This is my third go at it, the 2 others were 3 Bears OG which didn't get as tall.

A close up of the MBAP:

Not sure if I burned her early on. The leaves discolored several weeks ago before I offset the Cobs. Everything has been fine since then. Both girls are 55 days old, grown in soil. I'm a new hobby grower and still learning. Cobshop and Mephsito are making it seem easy.

One thing I love about the Cobshop lights are the temps. I'm able to keep growing inside in the hot summer. With the A/C in my place set at 78 degrees, the tent peaks around 84 degrees with 3 Cobs going.

 

[AutoWonders]

One thing I love about the Cobshop lights are the temps. I'm able to keep growing inside in the hot summer. With the A/C in my place set at 78 degrees, the tent peaks around 84 degrees with 3 Cobs going

Got to love those Autocobs.

 

[HemiSync]

I'd love to see what light stress looks like with autocobs. Like when you have too much light on a plant (e.g. two fixtures on one plant) or you get too close to the plant. I have played around with two lights, one light, close, far. I can't tell any frigging difference. But I'd like to recognize it if its there. So if anyone has a picture or can describe it that would be good.

I have read on the net that plants praying up to the lights is a sign of too much light, but is that true?

And I've read about cupping but I think that is more related to heat.

I do have a lot of fan circulation and maintain good temps so I don't have heat stress. So maybe that is why I don't see light stress even thought it might be there.

Reviving this thread cause I have something that doesn’t involve cupping but I’m pretty sure I’m looking at light / heat stress. This mother plant was vegged under a single AutoCob and then I decided to SCROG her and grow her out. She went into a tent with 200 Watts of cobs and for the first few days looked fine. yes I was aware of what might happen and being she’s a photo lady in veg and has time to recover I decided to risk it. So then some of the top leaves have started to die from the inside out. As soon as I started to see this spread I turned off two of the lights and raised the other two to 32”. Take a look and tell me what you folks think. It’s almost like I had a hot spot right over one section. Lux meter had it at 35k with the lights at 24 inches. Hey I only took her from 880 Watts per day at 6 inches to 3520 per day at 24 inches, I thought the old broad could handle it.

o

 

[Darthweeder]

Just started my first cob grow.
Had them only for the last weeks of the last grow but not throughout all the grow like I'm planning to do this time.

Currently at day 13, I have been having high temps (above 100 degrees/around 39 Celsius) every day, about half of the day.
And not sure if my plants are having a heat or light stress issue.

I'm guessing it could be a combination of them both?
Cobs are about 20-24 inches away.
2 plants, 2 cobs plus a mars 48 reflector 8 hours a day (during night).
24/0 schedule.

 

[HemiSync]

Just started my first cob grow.
Had them only for the last weeks of the last grow but not throughout all the grow like I'm planning to do this time.

Currently at day 13, I have been having high temps (above 100 degrees/around 39 Celsius) every day, about half of the day.
And not sure if my plants are having a heat or light stress issue.

View attachment 927513 View attachment 927514

I'm guessing it could be a combination of them both?
Cobs are about 20-24 inches away.
2 plants, 2 cobs plus a mars 48 reflector 8 hours a day (during night).
24/0 schedule.

You probably have a combination with those temps and with that light schedule of 24/0 I would back off the cobs to 32 to 36 inches away from those precious seedlings. I would turn that Mars off completely, they are usually pump out lots of hot air. Save it for when/if you need more penetration and can afford the extra heat.

My thoughts on 24/0 schedule. I never have understood why people run 24/0. I’m not a big believer in plants needing a rest, they are just an engine that runs on photons and sugars, but it has been proven that plants do somethings better in the dark. They transpire better in the dark and there is evidence that roots develope faster in the dark cycle. Cut some clones from some photo girls and put a set under 24/0 and a set under 18/6. My experience with this was the clones under 18/6 developed faster most likely because their roots developed faster than the others. With autos I run 18/6 and do the same with photos until the flip. Also the extra 6 hours is just more heat you have to worry about.

 

[Darthweeder]

Yeah, they were actually at 18 inches.
So I raised them to 30 and turned off the Mars completely.
Also changed to 18/6, lights out during the hottest part of the day.
And added biobizz leaf coat.

 

[AutoWonders]

day at 6 inches to 3520 per day at 24 inches, I thought the old broad could handle it.

How is that plant doing? Anymore problems?

My thoughts on 24/0 schedule. I never have understood why people run 24/0.

Before I switched to Autocobs, I ran my traditional mass built led lights full spectrum around the clock for many years. I felt that my yields were a little bigger and they finished a little quicker. Was it enough positive that way, hard to say definitively. With Autocobs, I'm at 20/4. I might try an around the clock test, but that is down the road if at all. It seems like I am constantly tweaking as it is. Love those Autocobs.

 

[HemiSync]

How is that plant doing? Anymore problems?

Before I switched to Autocobs, I ran my traditional mass built led lights full spectrum around the clock for many years. I felt that my yields were a little bigger and they finished a little quicker. Was it enough positive that way, hard to say definitively. With Autocobs, I'm at 20/4. I might try an around the clock test, but that is down the road if at all. It seems like I am constantly tweaking as it is. Love those Autocobs.

lol I know what you mean about tweaking. Unfortunately for me tweaking usually means screwing something up in the process. I need to stop tweaking and start growing. If you ever do the test be sure to calculate your electricity usage versus how much actual extra bud you get. Like I said, for me it’s about diminishing returns versus increased time & money.

As for that light stress issue I think I was having, not sure if it’s resolved or not. I removed the damaged veg and am still seeing some smaller sighs of it. I added some of GLN’s calmag pro today just to see if it might be partly caused by that. I’m thinking the plant was trying it’s best to use all that light and might have been burning up her calmag. I will grab some more pics tonight when I get home. I want to get her dialed in before I flip her.