Download f.lux for Windows - Free software to adjust your screen color and brightness
How to Download and Use f.lux to Reduce Blue Light Exposure and Improve Your Sleep Quality
If you spend a lot of time in front of screens, whether it's for work, entertainment, or communication, you may have experienced some of the negative effects of blue light. Blue light is a high-energy wavelength of visible light that is emitted by the sun, but also by digital devices such as computers, phones, tablets, and TVs. While blue light has some benefits during the day, such as boosting your mood, attention, and reaction time, it can also disrupt your sleep-wake cycle and cause eye strain, headaches, and fatigue at night.
Fortunately, there is a simple and effective solution to this problem: f.lux. f.lux is a software that 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 based on scientific research that shows how light affects your circadian rhythm, which is your internal clock that regulates your sleep and wakefulness. By using f.lux, you can reduce your exposure to blue light at night, which can help you sleep better, feel more refreshed, and avoid health problems.
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In this article, we will show you how to download and use f.lux for different devices and platforms, how to set up and customize it according to your preferences and needs, and how to troubleshoot common issues with it. We will also answer some frequently asked questions about f.lux at the end. Let's get started!
What is f.lux and why do you need it?
Before we dive into the details of how to download and use f.lux, let's first understand what it is and why you need it.
The effects of blue light on your eyes and circadian rhythm
Blue light is a short-wavelength, high-energy light that is part of the visible spectrum. It has some positive effects during the day, such as enhancing your alertness, mood, and cognitive performance. However, it also has some negative effects at night, especially when it comes from artificial sources such as screens.
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Download f.lux 4.120 for Windows - Filehippo.com[^2^]
Download f.lux (v4.120) Free on Windows, for personal use[^1^]
How to uninstall f.lux from your computer
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How to use f.lux with multiple monitors or displays
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One of the main negative effects of blue light is that it suppresses the secretion of melatonin, a hormone that regulates your sleep-wake cycle. Melatonin is normally produced by your pineal gland in response to darkness, signaling your body that it's time to sleep. When you are exposed to blue light at night, your melatonin production is reduced, which makes it harder for you to fall asleep and stay asleep.
Another negative effect of blue light is that it causes eye strain, which is a condition that occurs when your eyes get tired from intense or prolonged use. Eye strain can cause symptoms such as dry eyes, blurred vision, headaches, neck pain, and difficulty focusing. Eye strain can also affect your mood, productivity, and overall well-being. Eye strain can be worsened by factors such as glare, flicker, contrast, brightness, and distance from the screen.
By reducing your exposure to blue light at night, you can avoid these negative effects and improve your sleep quality and eye health. This is where f.lux comes in handy.
The benefits of f.lux for adjusting your screen color temperature
f.lux is a software that automatically changes the color temperature of your screen according to the time of day and your location. Color temperature is a measure of how warm or cool a light source is, expressed in degrees Kelvin (K). The higher the color temperature, the more blue light it emits. The lower the color temperature, the more red light it emits.
During the day, f.lux matches your screen color temperature to the natural daylight, which is around 5500K to 6500K. This helps you stay alert and focused, and also prevents your screen from looking too dim or yellowish compared to the ambient light.
At night, f.lux gradually lowers your screen color temperature to a warmer range, which is around 2700K to 3400K. This mimics the sunset and reduces the amount of blue light that reaches your eyes. This helps you relax and prepare for sleep, and also prevents your screen from looking too bright or bluish compared to the dark surroundings.
By using f.lux, you can enjoy the benefits of blue light during the day and avoid its drawbacks at night. You can also customize your settings to suit your personal preferences and needs, such as your wake time, bedtime, color presets, and more. We will show you how to do that in the next section.
How to download f.lux for different devices and platforms
f.lux is available for different devices and platforms, such as Windows, Mac, Linux, iPhone/iPad, and Android. Here are the steps to download f.lux for each of them:
How to download f.lux for Windows
Go to https://justgetflux.com/ and click on the "Download f.lux" button.
Save the file "Flux-setup.exe" to your computer and run it.
Follow the instructions on the screen to install f.lux.
After the installation is complete, you will see a small icon of a sun in your system tray (near the clock). Click on it to open f.lux settings.
How to download f.lux for Mac
Go to https://justgetflux.com/ and click on the "Download f.lux" button.
Save the file "Flux.zip" to your computer and unzip it.
Drag the file "Flux.app" to your Applications folder.
Double-click on "Flux.app" to launch f.lux.
You will see a small icon of a sun in your menu bar (near the clock). Click on it to open f.lux settings.
How to download f.lux for Linux
Go to https://justgetflux.com/linux.html and choose the appropriate package for your Linux distribution (such as Ubuntu, Debian, Fedora, etc.).
Download and install the package using your package manager or terminal commands.
You will see a small icon of a sun in your system tray (near the clock). Click on it to open f.lux settings.
How to download f.lux for iPhone/iPad
f.lux for iPhone/iPad requires iOS 9.3 or later and a jailbroken device. If you don't have a jailbroken device, you can use the built-in Night Shift feature instead.
To jailbreak your device, follow the instructions on https://canijailbreak.com/.
To install f.lux on your jailbroken device, open Cydia and search for "f.lux". Tap on it and install it.
You will see a small icon of a sun on your home screen. Tap on it to open f.lux settings.
How to download f.lux for Android
f.lux for Android requires Android 4.4 or later and a rooted device. If you don't have a rooted device, you can use the built-in Night Light feature instead.
To root your device, follow the instructions on https://www.xda-developers.com/root/.
To install f.lux on your rooted device, go to https://justgetflux.com/android.html and download the APK file.
Enable the installation of apps from unknown sources in your device settings.
Open the APK file and install f.lux.
You will see a small icon of a sun in your notification bar. Swipe down to open f.lux settings.
How to set up and customize f.lux according to your preferences and needs
After you have downloaded and installed f.lux on your device, you can set up and customize it according to your preferences and needs. Here are some of the things you can do:
How to set your location and wake time
f.lux uses your location and wake time to determine the best color temperature for your screen throughout the day. To set your location and wake time, follow these steps:
Open f.lux settings by clicking or tapping on the sun icon.
Click or tap on the "Change" button next to your location.
Type in your city name or zip code, or use the map to find your location.
Click or tap on the "Done" button to save your location.
Click or tap on the "Change" button next to your wake time.
Use the slider or the arrows to adjust your wake time.
Click or tap on the "Done" button to save your wake time.
f.lux will now adjust your screen color temperature based on the sunrise and sunset times in your location, and also based on when you want to wake up.
How to adjust the color settings and presets
f.lux allows you to adjust the color settings and presets for different times of the day, such as daytime, sunset, bedtime, and movie mode. To adjust the color settings and presets, follow these steps:
Open f.lux settings by clicking or tapping on the sun icon.
Click or tap on the "Options" button at the bottom right corner.
You will see four sliders that correspond to the four times of the day. You can drag each slider to change the color temperature for that time of day. The lower the slider, the warmer the color temperature. The higher the slider, the cooler the color temperature.
You can also click or tap on the "Expand color range" button to access more color options, such as candle, ember, darkroom, etc.
You can also click or tap on the "Color effects" button to access more effects, such as grayscale, dark mode, invert colors, etc.
You can also click or tap on the "Presets" button to choose from some predefined presets, such as classic f.lux, recommended colors, working late, etc.
Click or tap on the "Done" button to save your changes.
f.lux will now apply your chosen color settings and presets for different times of the day. You can also preview how they look by clicking or tapping on the sun icon and then clicking or tapping on each time of day.
How to use the bedtime mode and movie mode
f.lux also has two special modes that you can use for specific purposes: bedtime mode and movie mode. Bedtime mode is a mode that makes your screen very dim and very warm, which is ideal for reading before bed or falling asleep. Movie mode is a mode that makes your screen slightly dim and slightly warm, which is ideal for watching movies or videos without losing too much contrast or color accuracy. To use these modes, follow these steps:
Open f.lux settings by clicking or tapping on the sun icon.
To activate bedtime mode, click or tap on the moon icon at the bottom left corner. To deactivate it, click or tap on it again.
To activate movie mode, click or tap on the popcorn icon at the bottom center. To deactivate it, click or tap on it again.
f.lux will now switch to either bedtime mode or movie mode depending on what you choose. You can also adjust how long these modes last by clicking or tapping on the "Options" button and then clicking or tapping on the "Extra color settings" button.
How to disable f.lux temporarily or permanently
Sometimes, you may want to disable f.lux temporarily or permanently, for example, if you need to do some color-sensitive work, or if you don't like the effect of f.lux on your screen. To disable f.lux temporarily or permanently, follow these steps:
Open f.lux settings by clicking or tapping on the sun icon.
To disable f.lux temporarily, click or tap on the "Disable" button at the bottom right corner. You can choose to disable f.lux for an hour, until sunrise, or for a specific app.
To disable f.lux permanently, click or tap on the "Options" button and then click or tap on the "Quit f.lux" button. You can also uninstall f.lux from your device if you don't want to use it anymore.
f.lux will now stop changing your screen color temperature until you enable it again.
How to control your lights with f.lux
f.lux can also control your smart lights, such as Philips Hue, LIFX, and Nanoleaf, to match the color temperature of your screen. This can create a more harmonious and relaxing atmosphere in your room, and also enhance the effect of f.lux on your circadian rhythm. To control your lights with f.lux, follow these steps:
Open f.lux settings by clicking or tapping on the sun icon.
Click or tap on the "Options" button and then click or tap on the "Lighting" button.
You will see a list of supported smart lights that are connected to your network. You can select which ones you want to control with f.lux by checking or unchecking the boxes next to them.
You can also adjust the brightness and color range of your lights by dragging the sliders below them.
Click or tap on the "Done" button to save your changes.
f.lux will now sync your smart lights with your screen color temperature throughout the day. You can also turn off this feature by clicking or tapping on the "Lighting" button again and then clicking or tapping on the "Disable lighting" button.
How to troubleshoot common issues with f.lux
f.lux is a reliable and easy-to-use software, but sometimes you may encounter some issues with it, such as blue artifacts on fullscreen video, syncing problems in the cloud or between devices, or compatibility issues with multiple monitors or DisplayLink. Here are some tips on how to troubleshoot these common issues:
How to fix blue artifacts on fullscreen video
If you see blue artifacts or flickering on fullscreen video when using f.lux, it may be because of a conflict with your graphics driver or video player. To fix this issue, try these solutions:
Update your graphics driver to the latest version.
Update your video player to the latest version.
Change your video player settings to use a different renderer or output method.
Disable hardware acceleration in your video player settings.
Use a different video player that is compatible with f.lux.
If none of these solutions work, you can also disable f.lux temporarily while watching fullscreen video by using the movie mode or the disable button.
How to sync your settings in the cloud or between devices
If you want to sync your settings in the cloud or between devices, you need to create a free account with f.lux. To do this, follow these steps:
Open f.lux settings by clicking or tapping on the sun icon.
Click or tap on the "Options" button and then click or tap on the "Account" button.
You will see a login page where you can enter your email and password. If you don't have an account yet, you can click or tap on the "Sign up" link below.
After you have logged in or signed up, you will see a confirmation message that says "Your settings are now stored in the cloud".
f.lux will now sync your settings in the cloud and between devices that are logged in with the same account. You can also change your password, delete your account, or log out from this page.
How to use f.lux with multiple monitors or DisplayLink
If you use multiple monitors or DisplayLink devices with f.lux , you may need to adjust some settings to make sure that f.lux works properly on all of them. To do this, follow these steps:
Open f.lux settings by clicking or tapping on the sun icon.
Click or tap on the "Options" button and then click or tap on the "Advanced settings" button.
You will see a list of your monitors or DisplayLink devices. You can select which ones you want to control with f.lux by checking or unchecking the boxes next to them.
You can also adjust the gamma and brightness of each monitor or DisplayLink device by dragging the sliders below them.
Click or tap on the "Done" button to save your changes.
f.lux will now apply your chosen settings to all your monitors or DisplayLink devices. You can also check if they are working correctly by clicking or tapping on the sun icon and then clicking or tapping on each time of day.
How to contact f.lux support or report a bug
If you have any questions, feedback, suggestions, or issues with f.lux, you can contact f.lux support or report a bug by using one of these methods:
Visit the f.lux forum at https://forum.justgetflux.com/ and post your question, comment, or problem. You can also browse the existing topics and see if someone has already answered your query.
Email f.lux support at support@justgetflux.com and describe your issue in detail. You can also attach screenshots or logs if necessary.
Use the built-in bug report feature in f.lux settings. To do this, open f.lux settings by clicking or tapping on the sun icon, then click or tap on the "Options" button, then click or tap on the "Report a bug" button. You will see a form where you can enter your email, subject, and message. You can also check the box to include your settings and logs. Click or tap on the "Send" button to submit your report.
f.lux support will try to respond to your inquiry as soon as possible and help you resolve your issue.
Conclusion and FAQs
In conclusion, f.lux is a software that makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day. It can help you reduce your exposure to blue light at night, which can improve your sleep quality and eye health. It can also help you stay alert and focused during the day, and create a more comfortable and relaxing atmosphere in your room.
f.lux is easy to download and use for different devices and platforms, such as Windows, Mac, Linux, iPhone/iPad, and Android. It is al