Hybridway
Well-Known Member
Very cool!
Another side by side....by side HPS VS DE HPS VS COB LED
- Thread starter MeGaKiLlErMaN
- Start date
MeGaKiLlErMaN
Well-Known Member
One more day till the end of the first week of flower, may not seem significant to a lot of people but you can get a lot of information regarding how the plants react under different spectrums while being the same strains.
Little stretch on the cobs but the next 3 weeks will be more telling.
Lots of stretch on the DE HPS, and a middle ground between the two from the HPS.
Love seeing how close the stacking will be under the cobs, hope they're as dense as people talk about!
Little stretch on the cobs but the next 3 weeks will be more telling.
Lots of stretch on the DE HPS, and a middle ground between the two from the HPS.
Love seeing how close the stacking will be under the cobs, hope they're as dense as people talk about!
MeGaKiLlErMaN
Well-Known Member
Just snagged these bad boys/girls... Hope to find a decent permanent plant here.
MeGaKiLlErMaN
Well-Known Member
Quick pick at the tops, the order is DEHPS, HPS, COBs. Cobs are a bit ahead but this is a quick update, not in depth.
MMJ Dreaming 99
Well-Known Member
Great video. You may want to speak up when you are on the DE and HPS side because the fans are loud. How many COBs and what COBs are you running?One more day till the end of the first week of flower, may not seem significant to a lot of people but you can get a lot of information regarding how the plants react under different spectrums while being the same strains.
Little stretch on the cobs but the next 3 weeks will be more telling.
Lots of stretch on the DE HPS, and a middle ground between the two from the HPS.
Love seeing how close the stacking will be under the cobs, hope they're as dense as people talk about!
I am wonder if QB Boards have better penetration than COBs. Another thought is DE and HPS (when you have a bigger room) are going to drive cooling costs way up.
You could almost side light the COBs with T8s for next to nothing and it would be still cheaper than cooling those HPS and DEs.
MMJ Dreaming 99
Well-Known Member
Check out the leaves on the COBs versus DE and HPS. The leaves on DE and HPS are kind of cupping inwards while the COBs are flat. Why? Is the plant protecting itself from heat or is it being heat stressed?
Tim Fox
Well-Known Member
the cobs seem to be the only ones not suffering from Vapor Pressure
Tim Fox
Well-Known Member
vapor pressure deficit
MMJ Dreaming 99
Well-Known Member
Tim - is that what is happening to the leaves? The COB leaves look great and the others not too good. Most people have no idea what vapor pressure is.
MMJ Dreaming 99
Well-Known Member
Good catch bro.
Damn - I sure wish there was a QB Board in this test. They are fairly new though.
sixstring2112
Well-Known Member
first pic appears to have a bug problem which will effect yields alot.take a look bro before its a major prob in your rooms.
Tim Fox
Well-Known Member
can you point out where you see bugs? thanks
maybe the little brown specs?, are you thinking Mites?
MeGaKiLlErMaN
Well-Known Member
It's not about "penetration" It's about having useable light at the canopy, I'll do some measurements on this later and make another video... With the fans off lol.
The HPS will be removed as I get more cobs.
16 4000k DB binned 3590s
MeGaKiLlErMaN
Well-Known Member
Already being addressed, it takes some time.
MeGaKiLlErMaN
Well-Known Member
It's the small specks of white which is where they have bitten plants. But most stay under the leaves so you can't see them. SNS will save the day it just needs time.
MeGaKiLlErMaN
Well-Known Member
Would raising the light help this? It happens my last grow as well.
sixstring2112
Well-Known Member
Theres a chart floating around somewhere that tells you where to keep your r/h based on where you keep your temps or vise versa.its crazy high r/h and was designed for greenhouses and veggies.without having every single duck in a row its a bad way to grow pot imo.perfect conditions for bud rot and bugs.but alot of guys swear by it.
BM9AGS
Well-Known Member
My understanding is high co2 goes hand in hand with the VPD chart and some believe the high co2 wards off the bud rot issues. Of course airflow is a must.
Tim Fox
Well-Known Member
i have seen this happen now on my last 2 grows,, BUT only to certain strains,, on my last grow it was the Sour D that curled bad,, and now on this grow it was the headband strain,,,
raising the light did help,, but at some point , especially in flower you need the light power to be in the sweet spot,,
what I found helped more was More Fans,, move the air,, and speed up your exhaust fan if you can
For sure if a growing can keep his temps and humidity in the range on the scale, its best,,
i have that chart some place,, let me grab it
