I don't know what to think now.... When you buy bulbs for a vehicle, 4300K is white. Anything above that and you start getting a blue tint. When calibrating a display, you shoot for 6500K to a neutral white. Maybe there are different standards for different applications?
6500 K is the color temperature of sunlight (daylight at noon?). That is why you calibrate to it. The other thing to look at is CRI (color rendition index I think). 100 would equal exactly the same spectral distribution as the sun. Anything over 90 is acceptable, over 95 is very good.
4300k would be warm white. I think incandescent bulbs are lower than that. I personally can't stand incandescents and have switched over to daylight CFs. I'll make the switch to LED soon. There seem to be more and more options available.
