"pure white" is hardly pure - wrt to LEDs. Check their spectrum... Besides, I have no idea what you would call "pure white".
Basically there's a colour temperature binning for white LEDs and you can choose from a large range. The spectrum is still not broad band (lots of peaks).
You can also use cold white and mix in amber LEDs as needed to shift the colour temperature to what is 'nice' for you.
cheers,
george.