Either would be fine, but personally I'd opt for the 3000K. The blue-white 5000K to 6500K light is what we see on all the new cars with factory LED lights, for two reasons. Primarily, it gives marketers a hardon because it lets them babble, with no basis in fact, about "closer to natural daylight" and blah-blah-blah, and it differentiates new cars from old cars so people who enslave themselves to what they imagine other people think (keep up with the Joneses, etc) will feel like their old car isn't hep and stylish any more and they have to replace it.
Secondarily, published output figures for the cold white LEDs (5000K, 6000K, 6500K…) are somewhat higher than for the neutral and warm white LEDs (4000K, 3500K, 3000K). So obvs MOAR LUMENZ is better, right? Yes, if they're useful, but in this case the extra lumens are all in the blue-violet wavelengths, which are very difficult for the human eye to process effectively (in a word: useless light). If you've ever gone walking somewhere the local authorities retrofitting street lights from the awful old orange sodium ones to LED made the boneheaded decision to put in 5500K, 6000K, 6500K lights, you might have experienced a creepy feeling of light that's obviously there, but isn't helping you see. Keep walking til you get to a neighbourhood with someone else in charge who picked 3500K or 4000K LEDs, and suddenly the light seems to "start working".
The French took this to an extreme for sixty years; they required all headlamps to be yellow. Not like off-white or cloudy-lens yellow—real, deliberate
yellow like the headlamps in this '64 Valiant. Read all about it
here, if y'want.
View attachment 1715825582
One thing the higher colour temperatures are really good at is producing glare. For equal intensity, a ~5000K light produces just under 50% more glare than a ~3000K light, without any seeing benefit.
But 5000K is not extreme, and neither is 3000K. Again, either choice will be fine. If we were talking 6500K I'd call that too extreme in one direction, and 2700K would be too extreme in the other direction.
