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Have you ever noticed that the screen on your device (whether on your computer or iDevice) changes to somewhat of a bluish color at night? It tends to be a...
09-30-2011, 04:28 PM #1
F.lux Now Available on iOS
Have you ever noticed that the screen on your device (whether on your computer or iDevice) changes to somewhat of a bluish color at night? It tends to be a bright bluish glow that can at many times be blinding. This is a result of how the screen is engineered. This bluish glow or color temperature is in place to make viewing during the day much easier. The screens are supposed to behave like the sun so there's not a ton of strain on your eyes - basically, it adds a lighted setting so that the differences in lighting don't affect your eyes. However, when you use your computer or device at night, the scenario is totally different. Despite the blinding factor of the bluish light, studies have shown that this color temperature (the one that the bluish glow emits) can also be damaging to your health at night. Blue light is beneficial for your circadian rhythm (what keeps your body on a 24-hour schedule) during the day, however at night, it has negative effects. It can keep you up awake later at night as well as ruin the quality of your sleep. Sleep researchers have been studying the effects of devices such as cell phones, computers, and mobile tablets, finding evidence that this is truly the case.
Now you may be thinking that turning down the brightness is an obvious alternative. That is not the case - the bluish glow and the effects it has at night time is still present even when the brightness is turned down.
A company called F.lux created a piece of software (patent pending) called f.lux that can be installed on your computer (Windows, OS X, Linux) to make your screen's light adapt to the time of day. So during the day, the lights that are displayed as well as the color temperature is different from what is at night. With this ground-breaking technology, you are able to use your computer during any time of the day without having to worry about strain or negative effects on your body. F.lux just recently made their software available for iOS users through Cydia.
After installing f.lux from Cydia, you can change all the settings directly from inside the Settings pane. Inside the Settings tab for f.lux, you have a few options:
- At night - choose which type of bulb or lightning situation you are in so that f.lux adapts when it is night time (based upon the clock)
- Transition speed - change the transition speed from day to night (on older devices, it is instant to avoid flickering)
- Color-sensitive work - turn f.lux on or off
The Cydia description is highly comprehensive and explains a ton of useful information about this application. I recommend that you read this thoroughly if you find this tweak of interest to you. The description does make sure to alert you of a few things:
- f.lux does have a minor impact on your battery life
- The current version of f.lux requires Location Services to be enabled. If you happen to install it when Location Services are turned off, you must reboot or re-install it for it to work
- Although Locations Services is required, we do not track your information and have no servers on our end that capture information
- iPhone 3G support is still experimental at this point
Author: F.lux Software LLC
To find out more information about the company F.lux and their other products, visit the F.lux website. And if you don't believe the "studies" that were mentioned in the article, read up on the F.lux website. They have article upon article with extensive research evidence that validates their argument and why their product is legitimate.
Last edited by Joshua Tucker; 09-30-2011 at 04:48 PM.
09-30-2011, 05:05 PM #2
Interesting tweak. So, explain to me again why location services need to be enabled?
09-30-2011, 05:09 PM #3
I'll look at this... sounds awesome
09-30-2011, 05:12 PM #4
09-30-2011, 05:15 PM #5
09-30-2011, 05:31 PM #6
I wish they went more into depth about the four light settings. (Halogen, Candle, etc.)
09-30-2011, 05:35 PM #7
09-30-2011, 05:42 PM #8
Blue light tells our body its daytime and to be awake and alert. lack of blue light triggers chemicals that makes us sleepy and tells us its time to rest. Office lighting is usually neutral white and not warm white, to keep employees awake and alert. Home lighting is usually warm white to create a comfortable feeling and allow us to keep our sleep cycle. You can have cool white or neutral white in your home but your bedroom should be warm white. The backlight in most of our electronic devices use white LEDs, or white CCFL. White LED is made from blue LED, just coated with phosphor to create white light. Turning the LCD a warmer shade may help but im not sure how effective this is. Certain wavelength of blue might still get through. You can just use your monitor setting to turn the screen warm white without special apps or software. If you are worried about computer screen ruining your sleep, its best to just limit your computer/TV/phone usage at night.
09-30-2011, 05:44 PM #9
09-30-2011, 05:46 PM #10
09-30-2011, 05:49 PM #11
Installed it on my Macbook.
09-30-2011, 06:46 PM #12
I understand what it does now, it seems a little hard on the eyes the first time around.
Anyways, the iOS version has a slight bug. It flickers between warm and cool colors in the status bar every few seconds. Am I the only one noticing this?
EDIT: I rebooted. It seems to have stopped.
09-30-2011, 08:24 PM #13
i wish the iOS app had the same daylight setting as in the mac app...the tint of my iPhone does not match the tint on my macbook pro and iMac...
09-30-2011, 08:33 PM #14
09-30-2011, 09:36 PM #15
My Anti Virus program prohibits me to download this file, claiming it's a malware website.
09-30-2011, 10:23 PM #16
09-30-2011, 11:02 PM #17
Great little app/program. Have it on my Mac and PC. It's really weird at first because everything looks yellowish, but once your eyes are used to it, you can't even tell it's on.
09-30-2011, 11:41 PM #18
just put this on my iPhone 4iPhone 4 Verizon
Untethered jailbroken w/ Sn0wbreeze
10-01-2011, 01:30 AM #19
Put it on the iphone and ipad, however not a fan of it on the macbook. Otherwise great tweak for less stressed eyes while using at night.
Removed for being inappropriate. This is your sixth and final warning -
10-01-2011, 09:31 AM #20
Installed it and enjoying it so far. Would be great if you could enter a custom value in Kelvins like you can with their desktop version. The lighting in my room is not as yellow as incandescent, but warmer than halogen.