• Response to Apple's announcement

    14 Jan 2016
    Apple announced this week that they’ve joined our fight to use technology to improve sleep. There is a lot to be done. Indeed, workers on the “night shift” have nearly double the lifetime risk of cancer [1], and much of this is believed to be driven by exposure to bright light at the wrong times. Apple’s involvement in fixing this...
  • f.lux Holiday Gift Guide

    02 Dec 2015
    We’ve put together a list of some of our favorite things. Many of the books and products listed are ones we use and like a lot. Most links have affiliate codes, so if you buy something from this list, we’ll get some money and you’ll get the happy feeling of finding a great gift and helping to support f.lux development...
  • Re-Timer: Green light glasses to adjust your sleep

    01 Aug 2015
    We were recently introduced to Re-Timer, a wearable device which helps you change your sleep patterns. We’ve long been familiar with the work of sleep psychologists Dr. Leon Lack and Dr. Helen Wright— inventors of Re-Timer , so we were very excited to meet Dr. Lack recently at the SLEEP 2015 Conference in Seattle. He told us about his work...
  • When size doesn't matter: A survey of our users

    03 Mar 2015
    We know that big screens have a big impact on sleep. But what about smaller screens like smartphones? Screen size, brightness, and distance from your eye all matter, just like color. So a small screen should look a lot dimmer to your body. But a lot of people, especially kids, like to use phones really close. So we started our...
  • PNAS study: using iPad before bed has major impact on sleep

    22 Dec 2014
    A study published today in PNAS shows that reading a backlit device before bed makes your sleep measurably worse than reading a paper book under dim light. According to the study: While people are using an iPad at night their body produces 55% less melatonin After shutting off the lights (and the iPad), they took an extra 10 minutes to...
  • Using screens safely at night

    21 Dec 2014
    Using screens at night adversely affects sleep, but there are some things you can do to help protect your eyes. Click here to read about a new study, published in PNAS, that measures the sleep impact of reading an iPad before bed. Adjusting your screen Learn how to adjust your device’s brightness, and dim it as far as possible at...
  • How f.lux modifies ICC profiles (and how to change it)

    28 Oct 2014
    If you have a dual GPU mac, f.lux v34 will install a “f.lux profile” while it’s running, in order to avoid flashing as OS X switches between video cards. You can see this in System Preferences > Displays > Color. This new profile preserves everything in the system profile except the display table, and it reverts to the normal one...
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