Grams-Per-Watt is an erroneous measure of productivity

[BigTop]

Keep it real...

1. How long you been pullin? ... staying power is ultimately important vs a one time wonder...

2. How many pulls per fiscal year? ... shows efficiency & accounts for strain variance...

3. How many watts a bloomin? ... keeps efficiencies relative to one another...

4. What was the total pull for the year? ... keepin it real, tied to the above 3...

5. How much were your total op costs? ... also keeping efficiencies relative + real...



Break that down however you want, but this would seem to be the most important bottom line figures one should pay attention to. You can run all sorts of numbers to compare, but from these questions come the real data.

Peace.

 

[BlindDate]

No mr bean....but if it were legal you probably would not bother to grow at all regardless of where you live.

 

[BlindDate]

My personal record was 1.6 gpw
only once

 

[MeanBean]

No mr bean....but if it were legal you probably would not bother to grow at all regardless of where you live.

Maybe not, but that's ok I don't make my living off it.
not so simple for these big op guys and there the one who will be most effected.

 

[!!!]

For those on Mac or Linux, I wrote this quick shell script to calc g/kWh:

#!/bin/sh
# Find grams per kWh

function usage {
echo "Usage: ./gpkwh.sh Flower_Watts Weeks_Veg Weeks_Flower Wet_Yield <veg hours per day> <veg watts>"

echo "\nExample: 400w yielded 600g wet, vegged for 3 weeks and flowered for 10"
echo " ./gpkwh.sh 400 3 10 600"

echo "----------------------------------"
}

if [ -z "$4" ]; then
usage
exit 1
fi


FLOWER_WATTS=$1
VEG_WEEKS=$2
FLOWER_WEEKS=$3
WET_YIELD=$4

# Veg Hours per day
if [ -z "$5" ]; then
VEG_HPD=20
else
VEG_HPD=$5
fi

# Veg watts (default = FLOWER_WATTS)
if [ -z "$6" ]; then
VEG_WATTS=$FLOWER_WATTS
else
VEG_WATTS=$6
fi


veg_hours=`echo "scale=2; $VEG_WEEKS * ($VEG_HPD * 7)" | bc`
veg_kwh=`echo "scale=2; ($veg_hours * $VEG_WATTS) / 1000" | bc`

flower_hours=`echo "scale=2; $FLOWER_WEEKS * 84" | bc` # 84 = 7 days 12/12
flower_kwh=`echo "scale=2; ($flower_hours * $FLOWER_WATTS) / 1000" | bc`

dry_yield=`echo "scale=2; $WET_YIELD * 0.25" | bc`
dry_yield_oz=`echo "scale=2; $dry_yield / 28" | bc`
kwh=`echo "scale=2; $flower_kwh + $veg_kwh" | bc`
gkwh=`echo "scale=2; $dry_yield / $kwh" | bc`


echo "Veg kWh: $veg_kwh ($VEG_WATTS watts/$VEG_HPD hr/day/$VEG_WEEKS weeks)"
echo "Flower kWh: $flower_kwh ($FLOWER_WATTS watts/ $FLOWER_WEEKS weeks)"
echo "Total Power: $kwh kWh"
echo "Estimated dry yield: $dry_yield grams (~$dry_yield_oz oz)"
echo "Productivity: $gkwh grams/kWh"
echo "-----------------------"

Example usage:

$ ./gpkwh 400 3 10 600
Veg kWh: 168.00 (400 watts/20 hr/day/3 weeks)
Flower kWh: 336.00 (400 watts/ 10 weeks)
Total Power: 504.00 kWh
Estimated dry yield: 150.00 grams (~5.35 oz)
Productivity: .29 grams/kWh

$ ./gpkwh.sh 1000 2 8 4000
Veg kWh: 280.00 (1000 watts/20 hr/day/2 weeks)
Flower kWh: 672.00 (1000 watts/ 8 weeks)
Total Power: 952.00 kWh
Estimated dry yield: 1000.00 grams (~35.71 oz)
Productivity: 1.05 grams/kWh

This doesn't take into account the fact that a clone had prior kWh invested into it - unless you'd like to count those into the "veg weeks" parameter. I can turn this into an easy to use web app if somebody can host it.