Yes I guess some acclimation has occurred. But only in the sense that I hunt 14week phenotypes more than 16week+. Very few halfsib selections have made their relatively small way into open pollinations.
I think Clarke said back in the '70’s that double THC is produced at 12/12 than 10/14. The numbers maybe not exactly accurate but the principle seems true in my experience. Longer hours of light gives better effect.
The other thing is the color of the light in tropical regions is much more blue than far from the equator because of the angle of incidence vs atmospheric layers.
I guess very high quality can be grown indoor with a 1000w halide say 4200 burning 13 hours daily.