I set nightshift mode to automatically turn on in the evenings on my computer. I basically don't even notice it - unless I play a (certain) game at night that does not seem to honor the amber shift, and it seems very blue and very bright. Additionally, I will occasionally read my Kindle at night, and after using the computer in nightshift mode, the Kindle does seem extra blue and extra bright. I got a kindle OASIS for that reason, since it has a warm light mode, and it definitely makes reading more comfortable.