Is this yield accurate

What led lights exactly? cuz that matters a lot. if they are 1000w purple leds then they arent actually 1000w and more likely 100-300w depending on brand and model. the purple led sellers love to lie about the specs of their lights. using purple lights to hit max yield in your tent without co2 would require 1600w actual draw of purple leds. That means you would need anywhere from 6-16 of those lights to achieve max yields in that tent depending on the actual wattage of those lights. Those lights also tend to yield about 0.5g per actual watt. So each light will yield 50-150g on average dependant on wattage. if they aren't purples and are actually high-end white 1000w leds(never seen any that high, don't even think 1000w drivers are available) then you have more than enough light.