A Gram Per Watt? How?

jafro daweedhound

jafro daweedhound

Well-Known Member
GrumpyToker said:
General rule in regards to HPS flowering from my understanding is

2x4 or 8 sq ft = 400w
3x3 or 9 sq ft = 600w
4x4 or 12 sq ft = 1000w
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I would respectfully challenge these numbers Sir

You have increased your watagege per square foot from 400 watts by 50% in a 1 sq/ft increase in area. Would a 50% in area not coincide with area increase ?
4 X 4 = 16 sq/ft , this being said if 8sq/ft is correct then 16sq/ft would require 800 watts ?

In engineering light for a grow room it should be also noted that the number of photons reaching your plant canopy diminishes be a rate of 88.8% per unit travelled. example light that travels 1 foot from its source will in effect only deliver 11% of initial luminary out put.
100% / 9 = 11 +/-. That's why we use reflective materials such as a hood and wall coverings to reduce light loss and help compensate for this effect.

Have a budtastic day...
 
charface

charface

Well-Known Member
The gram per watt could just as easily be called the lb per cieling.

Meaning weigh your crop when it is done. Count the cielings in the room. Prolly 1

So 3 lbs
1 cieling

3lbs per ceiling

It means nothing to me.

Of course I keep track of weight but I do it like this.

Grow weed
Weigh weed =weight per harvest

Now keep refining that.

Or do what you want but it will not be a measuring stick that I will apply to my unique situation.
For reasons you stated
 
GrumpyToker

GrumpyToker

Well-Known Member
jafro daweedhound said:
I would respectfully challenge these numbers Sir

You have increased your watagege per square foot from 400 watts by 50% in a 1 sq/ft increase in area. Would a 50% in area not coincide with area increase ?
4 X 4 = 16 sq/ft , this being said if 8sq/ft is correct then 16sq/ft would require 800 watts ?

In engineering light for a grow room it should be also noted that the number of photons reaching your plant canopy diminishes be a rate of 88.8% per unit travelled. example light that travels 1 foot from its source will in effect only deliver 11% of initial luminary out put.
100% / 9 = 11 +/-. That's why we use reflective materials such as a hood and wall coverings to reduce light loss and help compensate for this effect.

Have a budtastic day...
Click to expand...
You sound like and engineer and are taking things to literally.

These are general recommendations that many manufactures suggest.
 
Feisty1UR

Feisty1UR

Well-Known Member
I'm growing in coir, is it possible to pull much from this? I know people joke around about "bout a lb" yeah, I get it. You aren't allowed to give people numbers.

But lets say everything is dialed in perfectly, the nutrients are close enough to optimum. Have much can I expect from this? It's a 2.75x2.75. 400w going, and I'm currently at my 2nd week of flower from these pics. They're much bigger now, the entire net is full. Roughly 70-80 budsites. It was topped 2x. ScRoGed. LSTed / 3 plants.

https://www.rollitup.org/attachments/img_1023-jpg.3637354/
https://www.rollitup.org/attachments/001-jpg.3637355/

Sorry for taking over the post OP, just don't understand this 1g/per watt conundrum whether its based off lumen output, how many plants you have - enviroment, training techiniques, genetics, equipment used, nutes etc etc
 
B

brimck325

Well-Known Member
gpw is a gauge for the grower imo. problem is most use it to "try" n show off. everyones grow is different, so it's not an accurate gauge all around. my best was round .95, so i keep trying for 1.....then i'll go for 1.25.....i grow the same way basically (always tweaking) and try to out due my last grow. mono-cropping is the best way to tweak your grow imo. just keep growing n u will keep learning....
 
T.C. Bosby

T.C. Bosby

Well-Known Member
Just to clarify I wasn't saying you need a 1000 Watt in a 3' x 3'. Just some figures as an example. As a newb it's somewhat hard to gauge what is correct when so many different users have so many different opinions. I've seen people recommend a 400 W for a 3x3 and I've seen people recommend a 1,000 W. But I'm seeing enough back and forth and disagreement here that 1g/watt is somewhat arbitrary. I guess it's more of a goal or barometer of success rather than necessarily a rule.
 
explosive82

explosive82

Well-Known Member
Feisty1UR said:
Are you being literal, or joking? I wanted to hit 4-6 zips per plant dry. After tallying the numbers I'm lucky to get even 6 zips.

I'd be very happy with atleast 12 zips for my first harvest. AK-47 is known to be a heavy yielder, I'm feeling hopeful :shock:
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4-6oz of good bud (not counting small stuff) is a very good yield. I would promise you that not a huge amount of people get that much so i would say thats a pretty great goal to have.
 
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