https://www.rollitup.org/t/johnsongrowlights-com-cx-9-grow.894034/
Signature is at the bottom under this
It's 32sf and it only comes out to 56 watts per square foot. people aim higher.. with 8 plants it's ~200 watts per plant..
There's something called the point of light saturation, which states that plants cannot photosynthesize light after a given intensity. That's for 1800w or 1200? Don't feell like doing the math right now lol