High Thebyrdman,
When you grow 1 gram cannabis per every 1 wattage you use for your lamp you do have a decent harvest!
We call it 1:1
When you grow a SOG with as many plants in a grow room with perfect conditions, 600 watts per square meter and add Co2 you can reach as much as 2 grams per wattage we call it 2:1
But I would try to get 1:1
So in your case that is 480 grams cannabis. You can do it they are looking beautiful!!! 😋