Grams Per Watt: Useful or Useless Information?

[Stunned]

So, I'v finished up my harvest
I think It was a success. End product smells amazing
After drying, I'm into the cure now
It occurred to me... how productive was my grow?
Was if as efficient as it could be?

A short summary.....
4 plants, nothing special. GD Purp, GSC, Fruity Pebbles (2 phenos)
Full Flora series lineup in 100% coco
Veg for 35 days, flowered for 65 and 67 days
Lighting was 2 X HLG 260 watt fixtures (4 QB 288 boards total)

My final weight after drying was 751 grams
If I divide 751 by my total wattage of 520, I get 1.44 Grams per Watt.
What am I to make of that, if anything?
Does it indicate anything good or bad?
I was under the impression that 1 gram per watt was the Holy Grail
Is this Holy Grail a thing of the past now with newer technology?
Am I even understanding how the concept is measured? lol
Any and all thoughts appreciated

 

[Marzbadrock]

More to it than gram per watt. Need to figure gram per watt per day per sq ft. If 2 people grow under 1000w and both harvest 1000 gram but 1 grew in 25 sq ft and took 56 days and other guy grew under 50 sq ft n took 65 days then no comparison.