Twilight no good? Works great for me.

If that's the same one I tried, it doesn't actually work the same. It works by overlaying a transparent reddish color over everything, effectively "redshifting" whites but also (and unlike flux/redshift) messing up black (black goes from black to red-tinged black).

This was very noticeable for me because I have an AMOLED screen, so going from black to red-tinged-black actually made my phone brighter.

Hmm, you're right about the blacks, but it does the trick for me. Definitely doesn't seem brighter to me, the blue-white brightness is far more wakeful.

I suspect it works much better on non-AOLED screens. In lieu of it, I use "Screen Filter" to turn my brightness down way below what I can normally.

I do have an AMOLED screen, but your eyes could very well be more sensitive to the effect you describe.

Yes, couldn't find a acceptable setting on my Nexus 4.

root + lux with nexus 4 plugin (astronomer mode) is amazing, check it out!

I have Lux and it's pretty good. I barely notice it changing the brightness.

They do for some devices. Contact herf for details.