I wish f.lux would show 1 wake up notification at most
I'm willing to try out the notification feature, since it reminds me to sleep, but
when I return to the computer after some hours the screen is filled with notifications, and I have to close each one.
Are you on 10.8 or a newer version?
We saw this bug on 10.8 but could not find a way to fix it. It should not be doing this on newer versions.
I'm seeing it too. Version 36.3 on OS X 10.10.5. Every half hour I get a Notification from Flux of when I'm waking up. Cool of it to see the future like that and all but, also really annoying.
As a work-around, you can try going to Notifications in System Preferences, and choose "banners" instead of "alerts". That way the notification will disappear after a few seconds.
Also if you dislike the feature, f.lux has an "Options" menu to turn it off in one click.