Sounds and looks like you've got it working well. The differences in latitude account for the outdoor temps-which in my case are what I use to regulate the temp requirements in the grow area.
Not all plants will change colors, it seems to come from it's heritage.
I had a selene finish recently that is a dark purple. A friend had seen her prior to finish and was salivating waiting for a taste. I was going near him and called him and then got stuck in a road construction traffic jam which cost me the time I had to put a taste in his hands. During our phone call he kept goin on and on about the color when I finally explained the colors don't get you high. Selene might be a lovely smoke, but the ones that I had have loose, fluffy buds with a mediocre high-looks are deceiving. In all fairness, I'm running her again to see.
Shnkrmn
Good looking room and plants-the do look happy and healthy.
Nice cheese harvest.