I've always thought the 'gram per watt' measuring stick was useless without other parameters like time taken into account.
If one plant grows 1000 grams with one month veg and a second grows 4000 grams with 6 months veg under the same 1000w light, which is making more efficient use of the electricity? The first was 1gram/watt, while the second was 4 grams/watt. It should be kwh/kg or some such.
Your half right!
Sea of Green crushes everything for efficiency as far as I know.
4x8 bed w12clones.
2wks in cloner
2wks veg
10wks flower
2x600 watt HPS
= 4.3lbs = 1.6gpw
Just dialing in notil bed still. Going to add CO2 next. Maybe supplemental side lighting. Hoping to hit 2gpw.
Your getting there! Read the following..
I say the GPW thing is really useless.
Look at it this way.
Growing method is the real key. SOG kills gpw!
Taking different light strengths and different size grow area's, including different growing styles.
You can produce as much as 4.35 grams per watt. This was done in a 2x2 ebb. It ran 4 inch Rockwool cubes and had 35 plants in it.
High yield strain and each yielded an average of 32 gr. 250 watt HID, plants flipped at 8 inch's.
Now up to a 4x4 and 64 plants in soil and 1 gallon pots (Plant Warrior pots)
600w HID
Same flip size, same yield average.
3.4 gpw
Grams per watt is basically meaningless...
Yes sir's! It took several dial in's to do this.....It can be done.
You should see what a rotating garden can do!