PsiloGrow
Active Member
Good luck to you as well.
Vero COB LED Causing Light Stress
PsiloGrow
Active Member
I got the seed from herbies and got 2 Afghani regulars and Bubbas gift from HSO as freebies.
Last edited:
PsiloGrow
Active Member
I would have a long time ago but sadly I have height restrictions, I definitely need to learn to use them. I wonder if I grew them under the light from seeds if that would make a difference. I do see that the plants are adapting though and making progress. Also how close are the lights from the canopy in that image? Like a foot? Thanks
dandyrandy
Well-Known Member
I had vero 29's until I switched a few months ago to 3590's. No issues. I use promix and feed Peters at 1.3 EC. 5 ml of calmag per gal each watering. Peters has some Cal etc. But I need the extra or my leaves get depleted. I do have dimming so I start with 150w vero 29's 5k and veg until they fill the cup then transplant to 5 gal buckets. I run at 400 w at 2 ft until they kick in. I have to feed each watering. That's every other day now. Around 1.5 gal per bucket. Running ~700w now. They are growing like weeds.
Airwalker16
Well-Known Member
Oh same ones I got. Shit seeds.
SomeGuy
Well-Known Member
It's deceptive. In places it less than a foot but other 18" or so. There is still room to raise them. But those are mature flowering plants. I veg in a 4*4 with 80w of vero10 led and 80w of Philips led. All COB. In veg the lights are 2+ feet away. I also work up to full lighting in the flower tent over a period of two weeks before flipping. Gradual increases in intensity are far better than instant. Going from CFL to cob is a huge difference in the amount of photon they are receiving w no time to adapt.
Humanrob
Well-Known Member
^^^^^^ What he said!
I'm using four Vero 18's running pretty hot (somewhere around 55watts each?), and I start them pretty high off the plants depending on whether they are seeds or clones. With clones, I'll start them at 4 ft for the first couple of days, and inch them down. Mine came with lenses but I only use those during flower, and only if I have a solid 18+ inches over the plants. 99% of the problems I've had with COBs were lessened or cured by raising them. As SomeGuy said, the plants do get used to them and you can *gradually* bring them closer. That room is approximately 2x2.5 btw.
I'm using four Vero 18's running pretty hot (somewhere around 55watts each?), and I start them pretty high off the plants depending on whether they are seeds or clones. With clones, I'll start them at 4 ft for the first couple of days, and inch them down. Mine came with lenses but I only use those during flower, and only if I have a solid 18+ inches over the plants. 99% of the problems I've had with COBs were lessened or cured by raising them. As SomeGuy said, the plants do get used to them and you can *gradually* bring them closer. That room is approximately 2x2.5 btw.
BobCajun
Well-Known Member
I was using 220w in 1.5'x3'x5' and it was too intense. Bleaching was a problem and yield was under 1 g/w. I put a dimmer on it and dimmed to 70% and it was an improvement. When I first put the plants in the tops are about 3' from the light and I just let them grow up to it, or about 18" from it. From experience I can say that 50w sq ft is too much with COBs. Now it's about 35. I really wouldn't go higher than 40.
dandyrandy
Well-Known Member
Here is 5 plants in soil in around 11 sq ft under 16 3590's at ~ 700w at 5 weeks. Flipped them 2 days ago. They eat a lot.
Attachments
not much mention of optics here, i have 70 degree reflectors (probly not the best choice) i had all the same problems. all the hps growers seem to blame the soil or nutrients makes sense with hps plants usually cook before they get to many photons but not leds , i tried everything nothing worked until i put the plants outside not very sunny and yet they exploded with the most beautiful lush growth i had ever seen obviously the main factor here isnt the soil as a newb growing in recycled soil i learned that its best to just ignore deficiency symptoms atleast until ive played around with the lights and environment. now i have my lights permanently at the ceiling, seems to do the trick with reflective walls and 70 degree optics 2 feet or 4 feet doesnt really matter the sweet spot is pretty big
nfhiggs
Well-Known Member
^^^^ THIS.
Any time you change from a weak light source to an intense one, you need to hard them off to it over a week or more. I would not be surprised if the cobs at 200W were 5 times the light intensity at the canopy, than the CFL's. I would do it by putting them under the cobs for 30 minutes in the "middle" of their day on the first day, then increase it by thirty minutes each day.
Last edited:
GreenThumbsMcgee
Well-Known Member
When I read this comment, a little Lightbulb went off above my head, like oh duh!!!! Hahaha. Took off the lenses, no more light stress!
I’ve grown under these Vero 18’s before, but the plants must’ve tolerated more light than this LSD strain can handle, because my auto gigabud is sitting next to it in the same tent, same light and has no problems at all....
Attachments
Last edited:
