Ever notice how people texting at night have that eerie blue glow?

Or wake up ready to write down the Next Great Idea, and get blinded by your computer screen?

During the day, computer screens look good—they're designed to look like the sun. But, at 9PM, 10PM, or 3AM, you probably shouldn't be looking at the sun.

F.lux fixes this: it makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.

It's even possible that you're staying up too late because of your computer. You could use f.lux because it makes you sleep better, or you could just use it just because it makes your computer look better.

From the archive:

What's happening during sleep is that you open the aperture of memory and are able to see this bigger picture.

Jenny Diski:

Inexpert though I am in all other fields, I am a connoisseur of sleep.

Later, you can remember or feel, but the only actual experience of sleep is not-knowing. And not knowing thrills me – retrospectively or in anticipation, of course. That one has the capacity to be not here while being nowhere else. To be in the grip of unconsciousness, and consciously to lose consciousness to that grip.