Software to warm up your computer display at night, to match your indoor lighting.

Welcome to f.lux To install, run flux-setup.exe when your download is complete. What to do first Set your location. f.lux works a lot better if it knows when the sun rises and sets. The sun is the brightest light …

Click the f.lux Mac download link. Click the zip file to expand it Double click the "Flux" application in your Finder window. Enter your location, set your wake time, and select the type of lighting in your room at …

Old new stuff (2013) f.lux can go warmer than 3400K now, down to 2700K. Or even 1200K if you really want it to. Support for color profiles from a hardware calibrator Movie mode. This setting warms up …

Circadian lighting with f.lux You already know that the light from screens can affect your sleep. Don’t overlook the rest of the lights in your house. By dimming and shutting off lights in your home, you can …

Click the zip file to expand it Double click the "Flux" application in your Finder window. Enter your location and wake time Uninstalling Go to the f.lux Settings panel (to the left of your system clock) …

beta version 4.140 (Oct 2025) Workarounds for Qualcomm Snapdragon (Adreno GPU) support for external monitors Fixes for numerous “app quit while dialog box is up” crashes Progress on per …

Light, Sleep, and f.lux support

Is your computer keeping you up late? f.lux is a free download that warms up your computer display at night, to match your indoor lighting.

It’s been a few years since f.lux for Windows got an update, but this new version is finally out of beta. We have a ton of new features and bugfixes to tell you about, and we hope you enjoy trying them out …