Newbie Question About Spectrum

So mother nature does not switch between different spectra in the wild . Both 65K and 30K are supplied at all times and things work out. As a matter of fact she does not check temp, TDS etc and her bud does indeed grow!
I believe many LED growers use full spectrum from veg through flower with good results.
AFAIK the HID fans do switch from MH to HPS. I have read that some HID folks go HPS for the entire cycle.

Have there been any controlled experiments where a grow was done using a combination of both 65K and 30k fluorescents for entire grow side by side to a grow where all bulbs were switched out for flowering? Of course keeping all other parameters identical.

I'm curious if switching bulbs will in fact increase yield or quality. If we do get similar results why switch out bulbs? Are we under the impression that all 65K followed by all 30K is better? Is it better?

Just wondering because I have read of some pretty impressive grows using full spectrum combination of LED from veg through harvest.

I know all this bulb switching and other technology is good for the hydro business and I'm not knocking them. Just seems that years ago we threw some seeds in the ground ,came back a couple of months latter and had good bud. likewise in college we dropped some seeds in a pot used a plain old "cool white" bulb and a couple of months later were pretty wasted.

Is there something about these new more potent strains that require much more care as far as light selection, attention to Ph etc.

I'm interested in when and why we went all out on environmental manipulation.

Happy New Year !!

The Sun do stands in different angles at different times at the year, letting different amounts of different wave lengths of light in

why a cold crisp winter day with high blue sky and the sun standing high in the sky seems bright and a later summer Sun/Sunset can make the sky all Red


another pice of logic info is that a small plant in Veg (that use most light with in the Blueish spectrum (400-500) only need up to 1/3 of the light as a hugh plant in full flowering, why most LED lights have a majority of Red`s in em, you can Veg with basically nothing, a household bulb will do (plant just grow at a slow rate) but in flowering where it need to develop its fruit it need strong light and mostly in the high spectrum (600-700)