1G/1W still the ganjaman numbers?

[Pompey_Monkey]

Vertical growers would have an definitive edge, say a 1000W bulb hung horizontal can/should cover about 5ft x5ft max, the result is 25sqft coverage.

My point exactly! - the grow technique is the variable not the wattage. That's how it is possible to start assessing the skill of the grower in terms of choices made...

In classical physics, efficiency is (broadly) defined as energy out/energy in. To me it's a no-brainer: more pot out for less power in = more melted faces for the same cost! lol

Again, subjective issues cannot readily be factored into the mix... I, for example, really enjoy a certain Sativa dominant strain which is less efficient to produce than many others - To me, however, it's worth the extra cost. At least I can reliably compare the cost of production to other strains though!

 

[Migwelder]

My last show ran 14k, half the room was soil in ebb/flow tables and the other half ebb/flow with growrocks and from clone planted till cut down day was exactly 56 days and I pulled damn near 20lbs, but It was mostly the strain and the fact I used "BigBud"....for those that remember that stuff...lol.

Ahh can't wait till I can start up again

 

[Pompey_Monkey]

My last show ran 14k, half the room was soil in ebb/flow tables and the other half ebb/flow with growrocks and from clone planted till cut down day was exactly 56 days and I pulled damn near 20lbs, but It was mostly the strain and the fact I used "BigBud"....for those that remember that stuff...lol.

Ahh can't wait till I can start up again

that's about 0.66 g/kW/hr - not including any power consumption figure for heating/cooling. My guess is that you used at least 15% more power for ventilation*. That gives a figure of approximately 0.57g/kW/hr.

*Probably twice that, but I'm feeling generous

 

[Lazyman]

When we talk about grams per watt, what we are really saying is grams per watt per 60 days flowering. Follows Jorge Cevantes math from the Marijuana growers Bible.

When comparing different strains grown in the same room, I like to compare grams per foot of vertical height as well. No sense growing a plant that only put out 6 grams per foot when another does 29 grams per foot (given the same veg time and flowering times.)

 

[HempAlchemist]

very interesting! this is a very debated topic. there are just so many variables to factor in. but what i think is our biggest problem, is that we dont have any given variables. Pompey_Monkey makes a great point, that we do need to factor in total kw usages, as it does factor into the total cost. the only thing i think that could be added to this would be a notation for lighting w/sq ft. watts / sq ft is important as far as helping negate the factor of ppl using the same amount of light in very different areas. something like g/kw/hr @ w/sq ft
that gives everyone the idea on the amount of lighting used in relation to the area, and also the amount of overhead needed to keep the environment optimum.

 

[Spanishwilly]

the square foot of the area gives you a variable to measure lite intensity.so many lumens per square foot.... Gots to quantify

Sorry, but I don't agree. It does not come into the equation at all.

 

[Spanishwilly]

my last harvest was 1.89 gpw on a 7 week grow. Im not sure how people are calculating G/W/D. I had 2000watts, CO2, in a vertical room dialed in to run based on amny grows in the same room strain was good but not great.

They're dividing the yield in grams by the wattage of the lamps, then dividing this result by the number of days that they had to burn electricity to get the crop.

Please tell more about your excellent yielding operation. That's a great result, CO2 or not.

 

[Bolo-lolo]

OK guys. but what about LED Light? lets say that i'm using 14W LED lamp (which is compared to 150W HPS) and i gona get... about 40 grams form 0,30 m^2 its giving me 2,85g for 1W
am I wright? Correct me if i'm wrong.

Peace

 

[Spanishwilly]

idk, im a big fan of G/sqr ft.....because no mater how much light you have you are always limited by space....G/w is an indication of how efficient you are with your lighting and electricity.


put it this way, if i have a 10x10 room and use 2kw and fill the room wall to wall with plants. i might get 4-5 lbs....

but if i have a 4x8 room and use 2kw and fill it from wall to wall, i might get 2-3 lbs.....


granted that the buds in the larger room may be not as nice or compact, but the overall yield will be much greater than the smaller room.


i think in the end you have to use both G/sqr ft and G/W to get the optimal efficiency level

Only if you're weighing leaves.

 

[Spanishwilly]

My last show ran 14k, half the room was soil in ebb/flow tables and the other half ebb/flow with growrocks and from clone planted till cut down day was exactly 56 days and I pulled damn near 20lbs, but It was mostly the strain and the fact I used "BigBud"....for those that remember that stuff...lol.

Ahh can't wait till I can start up again

Or 0.65 grams per watt. I think that's a reasonable thing to expect for most people.

 

[Lazyman]

Yep, 1GPW every 60 days works out to right around 2# per 1KW light (454gr X 2 = 908 grams instead of 1000 grams, but I subtract popcorn from my packs and don't sell it, so with 10% popcorn out 2# would be ideal) Getting anything over .6 gpw is doing well for an aircooled room, for a sealed/CO2 room you should be over .8 gpw/60 days.

Vert throws it all out the window though, I feel that vert grows should all achieve a minimum of 1gpw and go up from there.

 

[wickedpete66]

I use 600wt hps in my 3x3 hydrohut. there is no way i'm getting 600 grams in that size space off of 6 plants. Not on a 4 week veg and 9 week flower. the best ive been able to do is about 2.25oz per plant.

I use 1 gallon hempy buckets w/coco gh nutes micro/bloom, hygrozyme 5ml/gal once a week and cal mag once a week 5ml/gal. If someone has suggestions to bump these numbers up i'm all ears

 

[VerdantGreen]

gpw isnt a perfect measure of efficiency but it is something that everyone understands and can relate to - and calculate for themselves

i average 1.2-1.3 gpw with horizontal mod.scrog. yields range between 1 and 1.6 gpw
no CO2, organic soil, 250hps

tbh i dont think vertical throws anything out of the window yield wise. Heath aside i havent come across hardy anyone who can match my horizontal yields with their vertical yields. vert lamps only give out the same amount of light as horizontal at the end of the day.

VG

 

[El Toker]

I think Grammes per Watt per hour measured from the start of veg to harvest would be the most interesting and relevant metric for me.

However, before that, there needs to be more of a consensus of what is being weighed. IMO you should only count the properly dried buds after they've been trimmed.

 

[RewTheJew]

I am surprised most of you are not saying this is strain dependent.. a scrogged nl x ak vs a scrogged kush, would be a completely different ball game. In identical environments, I would expect to hit 1gpw with the nl x ak, but would only expect 0.5gpw with the kush.

It is kind of a dumb measurement, and only really benefits people who run the same strain over and over again (dialed in for perfection). You connoisseur growers, who are constantly trying new gear, have to constantly learn new genetics and how they react to environments, thus affecting yield. Of course, it could be that the only people concerned with hitting 1gpw are production growers. Idk, just my .02

 

[VerdantGreen]

definitely is strain dependent - hence the range of yields that i quoted.

i run new genetics all the time and nearly always get a gram per watt or more from them with my 250 hps. Deep Chunk has been the only exception so far and even scrogged i struggled to get 0.5 from it. nice smoke though so who cares

i actually think it's the smaller growers who are more likely to be interested in efficiency. with a tiny setup you want to wring the most out of it that you can - whearas in a big room it doesnt matter so much. jmo

VG

 

[Pompey_Monkey]

I am surprised most of you are not saying this is strain dependent.. a scrogged nl x ak vs a scrogged kush, would be a completely different ball game. In identical environments, I would expect to hit 1gpw with the nl x ak, but would only expect 0.5gpw with the kush.

It is kind of a dumb measurement, and only really benefits people who run the same strain over and over again (dialed in for perfection). You connoisseur growers, who are constantly trying new gear, have to constantly learn new genetics and how they react to environments, thus affecting yield. Of course, it could be that the only people concerned with hitting 1gpw are production growers. Idk, just my .02

Quite the opposite.

The g/kW/hr metric allows reliable comparison of yields between different strains.

I'm a small grower too. Believe me electricity ain't cheap here (and it screws the planet) so I want to maximise my results for the energy I input!

 

[acespicoli]

Z factor good point ... a little geek humor sorry

1G/1W still the ganjaman numbers?

:tiphat: Good evning from space! I have always, while growin, had a thought in my mind, when i produce more then 400g with 400w I can legaly call me a grower. Good weed off course. Is that still right? :artist: ..........bet it´s 800g w. 400w now

www.icmag.com

carry on...

 

[goingrey]

1 g/W is the new 0.5 g/W