BZZZT! Wrong! If your building soils from scratch with EWC and/or Cow, or any manure for that matter. What is one of the components your adding, one of the main reasons for using it? If you didn't use one or both of these things and build from raw components. You won't have shit for available living bio's......you're soil would fail to grow well, at all!
Living bio's, in the form of bacteria and fungus.....BTW "mycos" are fungus's and their are lots and lots of strains...
I also do some simple bio AACT applications in veg and bloom.
Now those prepackaged - dip your roots, or sprinkle on one's are basically useless in organic runs!
You're mistaken on several points here too. In dealing with COB LED's
HPS is inferior to COB spectral balance and production. It creates a longer bloom by not supplying more deeper blues that help proper finishing. I find HPS spectral delivery as lacking Nm banding that you get better trich production,potency and a more positive finish from. CMH too, and I'm about to test some duel arc bulbs that have 600w of HPS and 400w of MH. to see if that helps the "not enough blues" HPS, finish cleaner,faster!
In any artificial lighting for growing. If you supply multiple points of light in say 1 foot of separation from the others. You deliver less shading and better overlap/overall penetration for your intensity delivered. Less of the plant's outer branching turning in to the center - giving a more natural plant shape.....
Lastly, if the light draws less watts in use. No matter what your Kwatt hrs cost is.....You pay less for the same Kwatt hrs used in total!