Led Users Unite!

Randomblame

Randomblame

Well-Known Member
Irish-roller-1 said:
So do people generally find it's better to HPS for budding and keep the LEDs for veg. I hear the people saying they are strictly led but can anyone thats tried and used both answer ?
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Current top bin LED's beat HPS easily by around 20% and more. An example, Osram Square series diodes in deepred reach up to 3,9μMol/J(watt), a 315w CMH is 2,1μMol/J, a DE HPS has ~1,9 and standard HPS have even lower efficiency. Current Quantumboard v2 has for instance ~2,5μMol/J efficiency and 4 of them with an HLG-480 driver(500-550w max.) are used to replace 1000w HPS with no loss in final yield.
There are lots of vids on youtube(GML show, ...), mate, and here are a lot of qboard related threads.
I would suggest you look at a few...
 
SMT69

SMT69

Well-Known Member
Is the watts I’m pulling at the wall, actual true watts or is the driver and wire loss included?

If I’m running 350w, it might actually be less by the time it gets to my strips? Have to wait till Monday till my meters arrive, just wondering thx
 
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OldSchoolGrower

OldSchoolGrower

Well-Known Member
SMT69 said:
Is the watts I’m pulling at the wall, actual true watts or is the driver and wire loss included?

If I’m running 350w it might actually be less by the time it gets to my strips? Have to wait till Monday till my meters arrive, just wondering thx
Click to expand...
If Randomblame doesn't chime in with his great wisdom. I would say from talking and reading his posts and comments the answer is yes there is some some loss involved. He would more than likely be able to give you the numbers...
 
OldSchoolGrower

OldSchoolGrower

Well-Known Member
Unit Farm System Supply said:
looking forward to your more pictures, hope you will have a good harvest
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Thank you. Put a lot of work into it as well as the 2nd plant turned out to be male and trashed it and it's clones. Been trying to make up some of the lost yield. It hasn't been easy fighting the wife's anxious trigger finger. She was trying to get me to pull the trigger early last month. More pics will be forth coming along the way to harvest as well as 2nd cycle started. Her clones along with some GG #4.
 
Unit Farm System Supply

Unit Farm System Supply

Well-Known Member
OldSchoolGrower said:
Thank you. Put a lot of work into it as well as the 2nd plant turned out to be male and trashed it and it's clones. Been trying to make up some of the lost yield. It hasn't been easy fighting the wife's anxious trigger finger. She was trying to get me to pull the trigger early last month. More pics will be forth coming along the way to harvest as well as 2nd cycle started. Her clones along with some GG #4.
Click to expand...
you did good job:clap:
 
hillbill

hillbill

Well-Known Member
LST is great and easy way to get lots of light to lots of buds! Have fun and congratulations on getting back into gardening!
 
OldSchoolGrower

OldSchoolGrower

Well-Known Member
hillbill said:
LST is great and easy way to get lots of light to lots of buds! Have fun and congratulations on getting back into gardening!
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Thanks Hillbill. I've always loved and prefer LST throughout the years. In the early pics during early training, I had the branches bent down and bent sideways circling the bucket.
 
Porky101

Porky101

Well-Known Member
devile said:
Pics from Mars ProII cree 256: strain: Pink Freezeland , week#5 in progress, 3-4 to go
View attachment 4194248
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Nice quality, but that is a small nug...I have 1ounce "nugs" (more like branches that have stacked many buds).

Randomblame said:
Current top bin LED's beat HPS easily by around 20% and more. An example, Osram Square series diodes in deepred reach up to 3,9μMol/J(watt), a 315w CMH is 2,1μMol/J, a DE HPS has ~1,9 and standard HPS have even lower efficiency. Current Quantumboard v2 has for instance ~2,5μMol/J efficiency and 4 of them with an HLG-480 driver(500-550w max.) are used to replace 1000w HPS with no loss in final yield.
There are lots of vids on youtube(GML show, ...), mate, and here are a lot of qboard related threads.
I would suggest you look at a few...
Click to expand...
My Cree CXB 3590's hanging 1.2m high are beating out my DE HPS 1000W (900umols CXB3590 6x 80W vs 800 umols 1000W DE HPS @1.2m)

The difference is LED has virtually no IR, less power draw (more efficient) and a "better" spectrum daylight vs hps. \

Growing under LEDS has been the most confusing thing I ever did, it is VERY different growing under LEDS, be warned. (Worth the effort ultimately).
 
SMT69

SMT69

Well-Known Member
Porky101 said:
Growing under LEDS has been the most confusing thing I ever did, it is VERY different growing under LEDS, be warned. (Worth the effort ultimately).
Click to expand...
Can u expand on those thoughts.....what were the issues and how did you deal......thx

I am coming from outdoors to indoors with LEDS and it is confusing...lol
I've been going from raising them and crancking it up, to lowering and dimming...lol
 
hillbill

hillbill

Well-Known Member
Getting the mix right in soil was a big step and lighter is better. To little drainage slows transpiration and growth and allows easy overwatering. And very much worth that effort thing.
 
Randomblame

Randomblame

Well-Known Member
SMT69 said:
Can u expand on those thoughts.....what were the issues and how did you deal......thx

I am coming from outdoors to indoors with LEDS and it is confusing...lol
I've been going from raising them and crancking it up, to lowering and dimming...lol
Click to expand...
Good questions, mate!
Optimal ambient temperature with HPS is ~25°C(leaf temps ~27-28°C because of the IR part/800nm, +2-3°C). With LED it's ~28-30°C(because there is only a bit of far-red but no IR). Higher temps means you need higher humidity too; at ~28-30°C you need at least 60-65% RH for a good VPD and healthy growth(leaf temps 1-2°C less than ambient)

I recommend to read this about leaf temps with different light sources...
https://www.blackdogled.com/lst

and this about VPD..
http://www.just4growers.com/stream/temperature-humidity-and-c02/vapor-pressure-deficit-the-hidden-force-on-your-plants.aspx
 
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