4100k is a mid-spectrum bulb, better for Flowering, than Vegging.
6500k is optimum for Vegging and 2700k is best for flowering.
I have seen grows done on this site with all one kelvin, all 65s or 27s, and they grew and they got a harvest. But what is best is 2700k for Flowring adn 6500k for Vegging.
It is like asking can I ride from NY to California in a 4 cylinder Kia? Well,, yes you can, but a V-8 Cadilac would ride much better and faster adn smoother.
Lowes and Home Depot have the difference spectrums.