Autoflowering Question

do they grow better under 6500k or at 2700k or do they need both?

On my Snowryder auto I used 6400k for about two weeks and when she showed her sex, I switched to 2700k.

I use a mix of 6500 and 2700 leaning 80% towards the red spectrum in other words out of ten bulbs two will be the bluer veg spectrum the rest red. since so much of an autos life is spent in flower it should be more red.

thanks guys