• Here is a link to the full explanation: https://rollitup.org/t/welcome-back-did-you-try-turning-it-off-and-on-again.1104810/

Total watts per yield

Lucky Luke

Well-Known Member
I often see people saying they get such and such grams per watt. But they are are only calculating the watts of their lights and not including the fans, AC, humidifiers, heaters, pumps etc.

If your talking how much product per watt ,shouldn't the whole wattage be calculated? After all watts are a cost.

Thoughts?
 

mjinc

Well-Known Member
Becomes much more complicated to work out so I think it's the reason most folks stick to grams per light watt. Also power costs very quite a bit across the US and the world.
 

Swims_GD

Well-Known Member
i work out how much my grow costs to run a day in leccy X total days growing.
then how much ive grown and what that would cost me street value. then i compare the leccy cost from the street value it would of cost me and voila, thats my gain.


no grams per watt rubbish... too sciency
 
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WeedFreak78

Well-Known Member
I often see people saying they get such and such grams per watt. But they are are only calculating the watts of their lights and not including the fans, AC, humidifiers, heaters, pumps etc.

If your talking how much product per watt ,shouldn't the whole wattage be calculated? After all watts are a cost.

Thoughts?
It's grams per watt of light. It's a generalization for comparison between growers, not for calculating grow costs. It assumes that your running the necessary supporting equipment for whatever light you're running, such as fans, humidifiers, etc.

If you want to know your total costs, then you need to figure out all those things.
 

Dr. Who

Well-Known Member
Someone should ask @doublejj what his GPW is?

It's a meaningless measure of dick slinging....

Running SOG's in small area's can destroy GPW #'s.
Running massive tree's outside - kills all GPW bets.....

GPW = Who cares anyway... Get a good quality result? Be happy!
Just grow for quality!
 

Swims_GD

Well-Known Member
Someone should ask @doublejj what his GPW is?

It's a meaningless measure of dick slinging....

Running SOG's in small area's can destroy GPW #'s.
Running massive tree's outside - kills all GPW bets.....

GPW = Who cares anyway... Get a good quality result? Be happy!
Just grow for quality!
i wanted to take that approach but not enough rep yet to be so blunt.. :)
 

Swims_GD

Well-Known Member
It's true though....Eh?
defo true enough. once youve gone through your 2-3grow them numbers become irrelevant. it always seems the people new to growing care so much about it.

im happy aslong im not paying more electricity for less bud... compared to street cost and the laws here i need to have that little bit of comfort.
 

ҖҗlegilizeitҗҖ

Well-Known Member
I think gpw is just a generalization for people to compare numbers with each other and see who did "better" with a certain unit amount of light.
It's not a very good generalization though because less use far less watts then hids, and 600w hids are way more efficient than 1000ws so the gpw would be much diffrent between those
 

OldMedUser

Well-Known Member
Another thing that using GPW for comparison purposes that always bugged me was there is no time factor built into it. A plant that takes 12 weeks to finish is rated the same as one that finishes in 8 week but spends 50% longer under the same light.

GPW has no valid meaning until someone comes up with something like GPW/Time to grow or it's like comparing apples to oranges. All factors have to be balanced for variables or have no statistical meaning at all.
 

OldMedUser

Well-Known Member
I like the cost per gram idea. Factor in everything. Lights, fans, inline fans, a/c, pumps for the entire veg and flower period.
That definitely has more meaning than the ambiguous GPW comparison. It would allow low budget or even commercial growers to determine how to get the best bang for their buck. Then when you switched nutes, lights or changed the environment you would have a standard base of comparison to judge the pros and cons.

We should start a f'n movement! :)
 

OrganicGorilla

Well-Known Member
That definitely has more meaning than the ambiguous GPW comparison. It would allow low budget or even commercial growers to determine how to get the best bang for their buck. Then when you switched nutes, lights or changed the environment you would have a standard base of comparison to judge the pros and cons.

We should start a f'n movement! :)
I totally agree. The goal should be cost per gram. Not gram per watt
 
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