2.7 grams per watt Leds, truth or hype?

[.Smoke]

So I'm switching to Led from HID. The "goal post" for me has always been, "1 gram per watt and you're doing good" with hps.

I'm wondering if, and how close, you all are at actually harvesting 2.5+ grams per watt from your Led setups?
Is this feasible? Or is reality more like 1.5, 1.7, 2.0 etc etc..?

I'm just looking for a good starting point to shoot for without trying to get my expectations too high.
Any input is appreciated.

 

[Bose]

1 gram per true watt would be a great harvest i think.

 

[shroomhaze]

Most aim for 1 gram per watt kinda thing, in my opinion, it's mostly about the strain and the pheno. If it's all about shooting for the biggest yields; you choose strains that yield and produce huge buds. You can get a lot this way, gram per watt thing is really misleading anyways

 

[.Smoke]

1 gram per true watt would be a great harvest i think.

Fingers crossed that isn't the case.
That would average 137 grams per plant in my setup. The last time I grew something that small it was an autoflower.

 

[lungbutter]

ime if you spread your lights out and have them dimmed its pretty easy to get 2g per watt in a big enough space.

strain & grow method makes a massive difference too.

 

[Dopesmoka]

I fuk up every time and at least get 1.25 grams per watt

 

[Luvtheflower]

I average about a 1.7 g under 2 500w led.It isn't really about weight to me I shoot for higher quality buds over quantity.I'm about to start my first auto flower (mephisto orange haze)as soon as these lady's our finished.

 

[ҖҗlegilizeitҗҖ]

Gonna be chopping those GDP in the next couple weeks... I will keep you updated.
750w from the wall LED in my 4x4

 

[green_machine_two9er]

I average about a 1.7 g under 2 500w led.It isn't really about weight to me I shoot for higher quality buds over quantity.I'm about to start my first auto flower (mephisto orange haze)as soon as these lady's our finished.

Nice! Is that aloe I spot in the background??

 

[Dreminen169]

Gonna be chopping those GDP in the next couple weeks... I will keep you updated.
750w from the wall LED in my 4x4

750W in a 44 That’s insanity How do you keep the Temp Do you have a journal for this grow

 

[Jjgrow420]

750W in a 44 That’s insanity How do you keep the Temp Do you have a journal for this grow

not really...?
i run 1,330w in a 5x5....
2x 315 cmh
2x 240 dual cob led combo
2x 110w cob led combo
temps 77-80

 

[ҖҗlegilizeitҗҖ]

750W in a 44 That’s insanity How do you keep the Temp Do you have a journal for this grow

Yup! Usually runs 5-8°f warmer than ambient temps. Not too bad honestly, I also was running 1500ppm CO2 so my temps sat around 83-86° (on purpose)

4x4 RDWC Granddaddy Purple LED Grow

I'm running cultured solutions Do you think you will stay with it? Does it auto adjust the ph? How many parts is it (how many different bottles of stuff)?

www.rollitup.org

 

[Rurumo]

1g per watt was always an arbitrary, but realistic, number to shoot for for new growers using HID. To hit that, you can't make any major mistakes, you have to do your research, use decent genetics, etc. It isn't "hard" but it can take practice and possibly multiple grows depending on the individual-some people just have a "green thumb". If you do all of these things well and use modern high end LEDs you can get higher yields per watt, but there is a limit unless you decide to grow in a sealed room with co2. Average growers that I've seen here are getting similar numbers to HID lights-upgraded lighting really makes a difference only once you have the rest of your grow on point.

 

[Dreminen169]

not really...?
i run 1,330w in a 5x5....
2x 315 cmh
2x 240 dual cob led combo
2x 110w cob led combo
temps 77-80

Yup! Usually runs 5-8°f warmer than ambient temps. Not too bad honestly, I also was running 1500ppm CO2 so my temps sat around 83-86° (on purpose)

4x4 RDWC Granddaddy Purple LED Grow

I'm running cultured solutions Do you think you will stay with it? Does it auto adjust the ph? How many parts is it (how many different bottles of stuff)?

www.rollitup.org

right now I’m running 600W in a 44 with a 4” intake fan, 6” exhaust fan, 2 clip fans, & a tower fanI still have a hard time keeping in under 83℉ Also ambient room temp is only 70℉

 

[Jjgrow420]

what kind of exhaust fan. how many cfm
i run 2 6" maxfans. 330cfm and 420cfm

 

[Dreminen169]

what kind of exhaust fan. how many cfm
i run 2 6" maxfans. 330cfm and 420cfm

AC infinity, I think it’s 400CFM but not 100
Edit
yeah, I just looked on their site. It’s 402cfm. Does anyone know if I can retrofit a temp & humidity controller for my 6” with just the speed controller?

 

[.Smoke]

Here's another question for you all...
I will have 5- 220w boards in my 4'x8'. Is that going to be enough, or do I need to add 1 more?

 

[Dreminen169]

Here's another question for you all...
I will have 5- 220w boards in my 4'x8'. Is that going to be enough, or do I need to add 1 more?

1 more

 

[.Smoke]

1 more

Done.
Hopefully I can make something happen with 41.25w per sq. foot...

 

[ҖҗlegilizeitҗҖ]

Here's another question for you all...
I will have 5- 220w boards in my 4'x8'. Is that going to be enough, or do I need to add 1 more?

I think 30w / sqft is a good Parameter for sufficient LED coverage (assuming you have a quality light)
So a good guideline for a 4x8 would be 900-1000w from the wall.
Your 5 lights is 1100, so I'd say you should be good.
They could take more probably, but not much more before you probably need CO2