You said the results will shut up retards who call it crap.
0.65g/w isn't anything that shuts up people.
People call those lights crap precisely because the results will be around those 0.65 g/w.
People here don't want 0.65g/w, after 1/2 grows your light will have been the more expensive one.
This forum has a big DIY community and you can make (much) better light for the same price.
Also the money you spend on a more expensive but higher quality Cree/Vero/Citizen COB light will be paid back with the saving you make with a massive increase in yield if the lights are the same wattage.
You're a good grower, I have little doubt in your skill with growing a plant.
But there are people who can do 1g/w fine, who are much worse growers than you are, and they are doing it in soil.
Look at this light.
https://northerngrowlights.com/collections/all/products/photon-180cd-led-grow-light-1
https://northerngrowlights.com/collections/all/products/photon-180clu-1818?variant=21167728452
You might say, 360/330 dollar is too much.
But then you realize you should do at least 1.2 g/w with them, you're a good grower.
That's 234 gram vs 125 gram with the Chinese light.
109 gram more.
If weed is let's say worth 2 euro per gram for you.
That means you've saved a hypothetical 218 euros ith the Northern Grow light.
218 euro is about the difference in price between the quality Northern Grow Light and your Amazon/Ebay light.
So after the first growth is done, the lights are basically as expensive as each other.
Afterwards the Northern Grow Light is clearly 100% superior in every regard.
And that's assuming you can't do more than 1.2g/w, which you very well may be able to do.
If weed is let's say worth 3 euro per gram for you, then the Northern Grow Light is undoubtly cheaper than the Amazon light after the first harvest is done.
You understand now?
What seems cheaper at first, is actually more expensive.
So no, I don't think 0.65g/w for a 130 euro growlight is fine.
It may only be more cost effective if you intend to never grow again after the first harvest.
Last edit: But you've grown well.
You obviously know what you're doing with the plant.
The grow light can be better though