Colour Temperature on multi elements fixtures

I’m working on multi-elements fixutre. Astera Helios Tube to be precise.
I patched them in RGB and CCT… I don’t understand how to use the colour temperature channel on the whole fixture instead of element by element…I tryed to make a Preset in Global with one Pixel and i was hoping that i could apply it on all my fixture but did’t work.
It works on the whole fixture with the RGB’s Channel but not on the colour temperature channel…Do i miss something ?