GMSgrowsanswered grow question 4 years ago Yeah. They like to sell nutes. Those levels are for professional growers with ultimate lighting, ultimate environment, and max nutes. They just tell you the highest level possible but most have crappy led lighting and just as extraction fan and intake to control their environment.
Light is the most important thing for plants, yet people buy shitty amazon lights and tell everyone how good they are...NOT.
If led lighting is preferred then a good Fluence spydrx plus is the only model I would buy, but their really expensive. Even this light wont out perform harvest weight of A 1000W HPS, but it will come close.
So they aren't doing anything wrong telling you those levels because people do grow at that ppm. Light, environment, know how, food in that order and you wouldnt believe the size of the buds that will grow for you.