Just an observation of mine....
I find that the 6000K lights wash out brown color tones,
while the 4000K will actually enhance the brown tones.
I know this because, I came on a large Deer standing on the road in front of me.
I had the High beam on and saw it immediately, but when I turned off the low beam, the Deer was nearly invisible.
Try it. You'll see what I mean.