I'm new to this forum and eager to learn more about using f.luxometer. I'm interested in how it can help with adjusting screen lighting for better sleep.

Could someone please guide me on how to ask questions here ?
Where should I post if I have a query ?

Looking forward to your advice and connecting with you all.

Thanks,

f.lux is perfect for achieving better sleep and seems it could go a little bit further and help for people who suffering from migraine by adding future/filter which would shift or block 480nm and 620nm wavelengths on monitor.

Here's an iPad Pro:
https://fluxometer.com/rainbow/#!id=iPad Pro/6500K-iPad Pro&action=BlueLightHazard
0.0930 µW/cm2/lux

An iPhone X:
https://fluxometer.com/rainbow/#!id=iPhone X/6500K-iPhone X&action=BlueLightHazard
0.0808 µW/cm2/lux

The second screen would be "safe" according to one industry standard, but the change is only 13% less "hazard" light with the second spectrum.

But because these things happen over orders of magnitude - if there is a problem, you want 90% less harmful light or 99% less, not 13%.

Dimming your screen can do this kind of thing (and f.lux can do part of it too).

How Flux works to remove the bad blue color (waves between 380 and 470 nanometers).

The screen does not create bad waves, it just creates regular red, green and blue waves ?

Emil

We are supporting drag and drop upload of CSVs now, but you would need enough channels.

If you have 40 channels it's great, but like <10 you'd probably want to do your own fit.

May I tether a background application of f.lux from my android device to feed light sensor data into f.lux, that's running on a nearby pc, in order to adjust to the ambient lighting of the android device?
(if it were up to me, to prevent overt, background execution and battery hogging, I'd only enable the data to be read in and update the lighting adjustment according to steps at the most expected critical changes of ambient light during dusk or dawn per location, data I'd bet you collect :) )

If this is not already in the works, or a readily available implementation, I believe this would increase the accessibility of your application, and advance it to a larger demographic.

Naturally, I first wondered, does an outsourced light sensor have yet to become a feature in f.lux?

Thank you.

If you want a spectrometer the retail version does work.

The main reason is that "ratio" is not a risk - instead, "dose" (total photons absorbed) is how risk is measured.

If you are concerned about hazard standards, you need a meter that can respond to extremely high light levels (usually as a spot meter), and currently the meters we recommend cannot do this. So for our research partners who are actually measuring hazard levels, we do not want to misrepresent our capabilities.

But what we are talking about here is the idea from people in the displays industry that levels 50x lower than the international standards may pose a risk, and simply put: there is no documented hazard at normal display radiance levels.

We can compute a hazard factor at lower light levels, but we do not think the TUV/etc. focus on this single number is appropriate, because it ignores overall radiance level. The retina is known to respond to total photons absorbed, not to a ratio, so without a measurement that corresponds to actual ICNIRP dose levels, we should not endorse a metric like this.

As for your worry that f.lux is not adequate: f.lux by default reduces the hazard factor by more than 90% (exceeding the levels of 10-20% that are being used in the market), so I would not worry about us in that regard. If there is a problem in these ranges, we are doing something to help, and I would submit that reducing this light by 10-20% does not do very much at all.

IEC62471 specifies that there is no BLH under 500 lux for large sources, so there is just not much to say about computer displays.

The candela is an SI unit, so even though it's an imperfect measure, everyone is going to use "lux" forever.

The metric you reference is "actinic power per lux" and gives you a relative measure of how much of the action spectrum is active at a certain intensity level. Many many people have "lux meters", and lights are often specified in terms of lux, so this gives a way to compare two lights at the same lux level.

I think that changing the color temperature to a "warmer" setting would help--I'm not positive though. Adjusting the color temperature settings directly on my Surface Pro 4 (running Windows 10) is seemingly impossible without gaming its Color Calibration wizard or potentially creating and loading a custom International Color Consortium ("ICC") profile.

The hard thing to explain is that our eyes are designed to "ignore" intensity - you go from outdoors to indoors and the lights change by 100:1 or 1000:1 but you don't notice. So this is the main thing to explain - that you don't notice it but the light is very bright.

Yes this especially! It's definitely closer to 1000:1 when the sun is out! I want to explain that seeing bright daylight in the morning and throughout the day is just as important than wearing brown lenses as the night time lighting effect will be a bit less powerful.

Also I will discuss what you mentioned about lights not being the same brightness as daylight but having near half the alerting (melatonin productiom delay) effect, even though the body will have already started producing it near sunset. This eyewear will help reduce that change or interruption of the hormone and sleep could arrive sooner.

I'll pass on the info to dim screens as even though they seem dim, they're quite bright and getting significantly brighter.

I think that covers all the important parts, and I'll be sure to read the Ken Wright camping study, I know my wake time is different whenever I go.

Thank you for the help and especially the speedy reply. After I posted the message I started thinking how busy you might be so this is great. I feel a lot more prepared to explain the effects of light on human sleep and this is a coincidence boost as well. Merry Christmas, happy holidays, take it easy.