I got these for my Luxo lamps. There is a three position switch for 3500K, 4000K, 6500K.
Let's see if this switch idea is made for long tubes.
https://www.lowes.com/pd/Feit-Electric-Color-select-22-Watt-EQ-8-in-Cool-White-Circline-LED-Tube-Light-Bulb/5000762939