MIMedGrower
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The deal is to enable the chemistry the plant does internally. Photons are the energy inputs - to a variety of wavelength dependent engines. Plants have a more complex hormonal dependency than most realize - the flip to flower is only the most obvious to human observers. To produce other compounds and hormones, various plant structures have a daily light integral requirement to satisfy. When we satisfy those requirements fully at each stage, we get optimal production flow.
Nutrients are also an input - however research has shown that light spectrum, intensity and CO2 concentrations influence "flow". Flow is essentially the character of consistent, repeatable process if mastered.
I've used single Sun Blaster fixtures with high power lizard lamps for flower to reasonable effect. Depending on the canopy you have to cover, that may be fine. It does make for a frosty finish.
Don't minimize nutrient profiles. There are studies about trace elements going on. Like manganese has to do with cbd production.
It all needs to work in balance is the key.
But like I said my friend. I already believe and have done a good amount of research. the University of Utah has a ton of info.