You sort of have to go full sleep hygiene mode for it to work.

I use flux, but I also cut all blue light after 10pm. I use 1850k lights (aka candlelight) throughout the house after 10pm. My phone is also yellow shifted and I watch tv yellow shifted too (by only watching from a computer with flux at night).

All those things together made a huge difference in sleep quality.

"Does it help you sleep?"

"Yes. Mainly when I practice good sleeping habits, though."

/s :)

It's part of an overall routine. Like how they tell you the cereal is just part of complete breakfast, as long as you add milk, fruit, and a some eggs. :)

But then how do you know how much of a role Flux is contributing (if at all) to the effectiveness of that routine?

If I use non-flux screens but change nothing else my sleep is a lot worse.

And when is your target time to go to sleep?

1am sleep 8-9am wake up.

Why do you go to bed at 1am if you only sleep from 8 til 9am? ;)

he goes to sleep at 1am, and gets up at some time between 8 and 9

Yep, between nights I use my computer late and those I don't, I see no difference on in sleep patterns or next day fatigue etc.

I think it's probably much more of an issue for people already susceptible to inspect insomnia or other sleep issues.

I've found that the effect of sleep deprivation and fatigue in general tends to lag by one full day on average, which makes it harder to mentally correlate between causes and consequences, especially when you're tired. In other words, my alertness on Monday mornings directly depends on how much I slept between Saturday and Sunday. OTOH it also means that I'm able to pull an all-nighter if necessary, but the adverse effects will kick in one day late.

F.lux, Windows 10 night light and Android's bedtime mode are great distractions at best and to me they serve more as a bedtime reminder. I feel that most sleep assistants and other life-hacking tools are mostly placebo that give you the feeling you're in control, which is a state the human brain likes. Sadly, it also means that once you know the placebo effect, those tools become useless. :-)