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That will probably not work in the summer. f.lux won't turn on its effect until the sunset at midnight for example, even if you start it at 9pm (planning to go to sleep at 10pm).

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I use a cronjob with redshift[0] and it works. You can set it to simply toggle the effect without any scheduling (`redshift -O 3400` to enable, `redshift -x` to disable). I have it set to enable at 9PM and disable the next morning when I open my laptop lid ;)

[0] http://jonls.dk/redshift/

I can manually set the time i go to sleep, playing with that setting moves around the "curve" of bright/dimmed light. I have set it so that flux thinks I wake up in the middle of the night, so it dims the screen in the early evening.

Personally I wont stop using f.lux, what I really like is that I can set custom colours and get a more orange screen even during daytime. I really like the softer colours, even when the sun is up.

That setting only exists on Macs last i checked so that is quite useless

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