![]() You can also adjust the desired light temperatures and choose a slow transition speed, so the colors on your screen will gradually change over 60 minutes instead of 20 seconds. You’ll want to go into the Settings screen to enter a more precise location. It will try to automatically detect your location, but it doesn’t work all that well. Instead, you’ll want to set it up once and then mostly forget about it. Android: You can get f.lux for Android, but it’s only available on rooted phones. Similar apps like Twilight are available for non-rooted devices.į.lux isn’t the kind of program you constantly fiddle with.However, Apple has its own very f.lux-like feature built into iOS 9.3 called Night Shift that you can use instead. Apple’s restrictions prevent software from doing this. iPhone and iPad: You’ll have to jailbreak your iOS device and get this software from Cydia if you desperately want it.Windows, Mac, and Linux: Grab f.lux from the official website and install it.While we can’t say f.lux’s claims have been scientifically proven, we can certainly say they seem plausible.į.lux is free to download and use, so you can try it out for yourself if you’re curious. Subjectively, many of us have realized that staying on the computer staring at a bright screen late at night keeps us awake, while stepping away from that screen helps make us more tired.į.lux’s website has information about research in the area. However, a variety of studies have found that being exposed to bright blue light can affect your sleep schedule. ![]() Unfortunately, there have been no scientific studies of f.lux itself. But, obviously, we can’t just trust these claims without looking at the science behind them. Some people just use f.lux because it makes their screens easier on the eyes, some use it because they think it helps them sleep better, and some use it for both reasons. We just covered the promise of f.lux, anyway. Here’s a good illustration of the Kelvin color temperature scale, which is used to quantify color temperature. f.lux aims to make that blue glow more of a reddish glow. Just look at the blue glow you see coming from a screen at night, and then compare it to the warmer, redder glow coming from a typical light bulb. The theory is that looking at a warmer display at night will help reduce eye strain, and - because you’re not staring at a bright, sunlight-like screen - cause your brain to secrete more melatonin and help you get to sleep earlier and sleep better. Yes, some computers have brightness sensors and will adjust the screen brightness depending on how bright it is around you, but the color temperature doesn’t change.į.lux will use warmer colors at night than during the day, making white colors appear a bit more reddish. The theory is that staring at these bright, sun-like screens - late into the night or morning, as many of us do - strains our eyes and inhibits melatonin production. But our computers didn’t get the message.
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