Someone took a H2O 2 apart and posted a pic here
https://www.e-reader-forum.de/attach...2-dsc-0005-jpg As you can see, the light is very even. No discoloration.
The only complaints I have seen about the H2O 2 light (and is true of mine) is a slight brightness in the bottom corners. But it's easy to ignore and the colour is perfectly even.