Grams per Watts

splifchris

splifchris

Well-Known Member
Ok so i thought i would type the extract about grams per watt... I have read alot on here about people claiming huge yields so i did some research and found this in the " indoor marijuana Horticulture, the in door bible" by George Cervantes....

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Harvest yield is measured in 'grams of dried bud per 1000 watts in the flowering room per 30 days'. This means that a two pound crop grown under 1000 watt lamp for 60 days produces one pound per 1000 watts per 30 days... Another example is : One 1000 watt lamp that yields one pound in 60 days of flowering produces a half pound per 1000 watts per 30 days. Grams per watt per 30 days is an easy convertion - 454 grams (one pound) per 1000watts per month. For example, a 1000 watt lamp that produces that produces 500grams in a month yield one gram per watt. The bench mark of a good harvest is 0.5 grams per watt of light every 30 days in the flowering room.

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So i think from what it says here.... most people dont do it per 30 days.... they just do it straight gram per watt.... So basically most people on here are doubling there yield per watt ratio when flowering for the average 8 weeks....

Anyway... Thought i would share....

> Chris
 
CiderSpy

CiderSpy

Active Member
I think yield changes there are a lot of variables , pot sizes, climate, water, nutes. should all change your gram per watt. I'm more in to Lumens per watt, and how much quality of light I'm getting for the price.
 
splifchris

splifchris

Well-Known Member
Absolutely... This (0.5 grams per watt) is what the Pro's are aiming for under optimum conditions!!!!
 
Mauler57

Mauler57

Active Member
My 1 plant 4.5ft, vegged for 30 days and her 3 babies, vegged for 10 days and flowered for 9 weeks just yielded me 3.69 Lb (59.04 oz's) of trimmed wet. If we go by the 25% rule yield after dry, my total dry yield should be approximately 14.75 oz or 413 grams.. I used 1 400w HPS for a net of 1.03 grams per watt...Spot on.
 
splifchris

splifchris

Well-Known Member
Mauler57 said:
My 1 plant 4.5ft, vegged for 30 days and her 3 babies, vegged for 10 days and flowered for 9 weeks just yielded me 3.69 Lb (59.04 oz's) of trimmed wet. If we go by the 25% rule yield after dry, my total dry yield should be approximately 14.75 oz or 413 grams.. I used 1 400w HPS for a net of 1.03 grams per watt...Spot on.
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Congrats on your 420th post!!!!
 
Gastanker

Gastanker

Well-Known Member
Grams per kilowatt hour is what people should be reporting. Grams per watt is extremely deceiving. This is a blurb i left in another thread that applies -

.5g/w is considered good, 1g/w is considered a pro. What people should report is gram/kWh. g/kWh flouros do very well in comparison to HID.

I pulled 5.4oz my first grow with CFLs:
15 day veg:
First 10 days @ 18hrs*23w
Days 10-15 @ 18hrs*46w
Total veg kWh: 8.28 kWh
60 day flower:
Days 1-20 @ 12hrs*230w
Days 21-40 @ 12hrs*296w
Days 41-60 @ 12hrs*388w
Total flower kWh: 219.36
Total kWh: 227.64 Total yield in grams: 151.2 g/kWh: .665 g/w: .39

Now lets look at a 400w HID:

400w*18hrs*15days = 108 kWh veg
400w*12hrs*60days = 288 kWh flower
Total: 396 kWh

Over the course of the same grow the 400w would use 178% more electricity so anything less than 270grams and the HID is doing worse g/kWh. I personally don't know anyone that can pull 9.5 oz from a 400w with a 15 day veg but if you did it would be .675 g/w.

Here .675 g/w HID is the equivalent to .39 g/w CFL once you take into consideration the actual amount of electricity used. So again simply stating g/w is pointless.
 
S

spandy

Well-Known Member
LOL, I love it. It's like a bunch of people arguing how they should measure their dicks to see who the winner is. got those wanting a wooden ruler, some say it needs to be a fabric measuring tape cuz they gots a crooked dick and a wooden ruler cheats them, some want it metric, others in standard, inches for most, some centimeters so the bigger number makes them feel like less of a woman, and a small few say that only girth counts cuz they got a fat baby dick and want to be included.






A pound...
 
splifchris

splifchris

Well-Known Member
spandy said:
LOL, I love it. It's like a bunch of people arguing how they should measure their dicks to see who the winner is. got those wanting a wooden ruler, some say it needs to be a fabric measuring tape cuz they gots a crooked dick and a wooden ruler cheats them, some want it metric, others in standard, inches for most, some centimeters so the bigger number makes them feel like less of a woman, and a small few say that only girth counts cuz they got a fat baby dick and want to be included.






A pound...
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Your the hater from the other thread.... You my friend are one cock jocky!!!!!
 
TechnoMage

TechnoMage

Well-Known Member
Gastanker said:
Grams per kilowatt hour is what people should be reporting. Grams per watt is extremely deceiving. This is a blurb i left in another thread that applies -

.5g/w is considered good, 1g/w is considered a pro. What people should report is gram/kWh. g/kWh flouros do very well in comparison to HID.

I pulled 5.4oz my first grow with CFLs:
15 day veg:
First 10 days @ 18hrs*23w
Days 10-15 @ 18hrs*46w
Total veg kWh: 8.28 kWh
60 day flower:
Days 1-20 @ 12hrs*230w
Days 21-40 @ 12hrs*296w
Days 41-60 @ 12hrs*388w
Total flower kWh: 219.36
Total kWh: 227.64 Total yield in grams: 151.2 g/kWh: .665 g/w: .39

Now lets look at a 400w HID:

400w*18hrs*15days = 108 kWh veg
400w*12hrs*60days = 288 kWh flower
Total: 396 kWh

Over the course of the same grow the 400w would use 178% more electricity so anything less than 270grams and the HID is doing worse g/kWh. I personally don't know anyone that can pull 9.5 oz from a 400w with a 15 day veg but if you did it would be .675 g/w.

Here .675 g/w HID is the equivalent to .39 g/w CFL once you take into consideration the actual amount of electricity used. So again simply stating g/w is pointless.
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I'm impressed with that type of yield using CFLs. I was well over 400w using a mix of T5s and T8. Here's my g/kWh
Clone: 7 days @ 18hrs*54w T5
6.804 kWh
Veg: 25 days @ 18hrs*162w T5
72.900 kWh
Flower: 78 days @ 12hrs*400w HID
374.400 kWh

Total 454 kWh
Total yield 221 grams
.486 g/kWh
 
J

just wondering

Member
hey there im new to this roll it up website and was wondering if u could help me ive curently got a 1200 watt hps grow using two large adjusta wings ive got 10 plants in soil (bio bizz light mix) im three weeks into flower im using the scrog method ( well trying) lol and i was just wondering if 600 grams is going to be easy to achieve out of this setup and what u would recomend at this stage to boost my averall yield?
 
D

Diabolus Sonata

Member
I tried explaining how important time was in the calculation however when I started a thread about it all I got was SHIT. So fuck it!!!!!!!!!!! Im with Homeboy who posted in my thread and here:

A fucking pound.

I hope you get a better responce. I agree its just checking dick size but if we are gonna do it lets all use the same ruler. (cleaned between use tho!!)

I say 365/ by days flowered= havest a year x total grams at harvest/ by watts = gram per watt as a fast flowering plant will yeald more in a year than slow flowering plants thus more grams per watt.

this is from my thread:

"John: 1000 watts gets 1000 grams and does it in 55 days. a 1gr per watt ratio but.
365/55=6.6363 x 1000 grams = 6636 grams / 1000 watts = 6.63 grams per watt

Dick: 1000 watts gets 1000 grams and does it in 140 days. 1 gr per watt
365/140 = 2.6071 x 1000 grams = 2607 grams / 1000 watts = 2.60 grams per watt.

Both looked to have 1 to 1 watt to gram but frequency is the key. Its just a tool. If either grower betters their grow game the numbers will reflect it. "

Now whos weed dick is bigger John or Dick??? I know I'd rather have the extra 3500 grams...
 
TechnoMage

TechnoMage

Well-Known Member
Diabolus Sonata said:
Now whos weed dick is bigger John or Dick??? I know I'd rather have the extra 3500 grams...
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I'd rather have the better smoking weed, quality over quantity any day. I don't disagree about using the same ruler but I also think that focusing just on the light source gives a distorted view. Soil/Hydro, nutrients and strain all play important roles.
 
D

Diabolus Sonata

Member
TechnoMage said:
I'd rather have the better smoking weed, quality over quantity any day. I don't disagree about using the same ruler but I also think that focusing just on the light source gives a distorted view. Soil/Hydro, nutrients and strain all play important roles.
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I agree 100%! but a 55 day flower is with some bad ass indica is quality. I love the ko couchlock tho. I think its a good tool for me to check how I'm doing from grow to grow and for you to check how your doing. But in no way be should it be used in my grow vs yours. Your right to many factors to consider. My example was to show how using havested grams / watts is useless and does not show a clear pic. Throw out all your personal likes and dislikes and look at the numbers. They are 3500 grams apart and both have a 1 to 1 gram/watt. Regardless of likes or dislikes its useful with time factored in and useless just grams/watts. Shit just use it to see avg harvest a pheno gives you in a year vs another pheno. Both may give you a 1 to 1 but a little need flowering time may make a big dif over a year. Or use it to see if you do better with a pheno over time. Now when I see a thread about how big someones weed dick is all I can think of is "oh how cute, a NOOB"
 
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