For those of you without a built-in night mode or a night mode which requires several clicks to get to you can set it up as a keyboard shortcut. Obviously, setting it up as a terminal alias works too but the first thing I do when my desktop loads is CTRL + R and I get my night mode color temp the way I like it. Just wanted to share a tip.
I think it would be better to have one shortcut to switch between night and daymode. Should be possible somehow.