Rooms can be as bright as the outdoors

Re:Rooms can be as bright as the outdoors by jiofih on Sunday December 01, 2019 @06:17AM (#21674937)

You are indeed making claims, and worse, generalizing a “lack of evidence” from a handful of unrelated studies you picked. It’s kinda obvious that not all of the studies linked in the flux page are about blue light specifically, but how electronic device usage affects health. The effect of blue light is widely accepted in the scientific community and not some kind of fringe theory.

On your campfire rant, first, luminosity is an astronomy measure, what matters for humans is the perceived light (lumens); nobody stares at a campfire directly and the little light bounced from the surroundings has very little blue; on the other hand, you literally stare non-stop for hours at the blue light from your phone, which makes the amount it emits a lot more relevant.

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Re:Rooms can be as bright as the outdoors by bildung on Sunday December 01, 2019 @12:04PM (#21676392)

Well then, feel free to provide the research. You can then also send it directly to UK's General Optical Council because they actually sue companies who claim health benefits from blue light filtering [1] because there is no evidence for real-world effects. Or the EU's Scientific Committee on Health, Environmental and Emerging Risk, because they, too, say that there is no scientific base for the claim of real-world effects [2, page 90]. Or Cochrane review, who say that there is no health effect in case of macula degeneration [3].

Also please don't get personal. My campfire illustration was not a rant, it was an illustration of humans using light after sunset. It is a fact that they did so for millenia. It is also a fact that a 1300K hot fire emits blue light and even UV light.

And luminosity (lux) is just luminous flux (lumens) per square meter. Astronomers use that because luminosity is the measure used to compare different light sources. If comparing e.g. a ceiling light and a phone screen one uses luminosity because that makes both light sources easier to compare. It is also the measure most research on light effects work with. You could of course multiply the 1000lux of a bright phone display with its surface area in square meters if you prefer to calculate in lumens.

[1] https://www.aop.org.uk/ot/industry/high-street/2017/05/26/bo...

[2] https://ec.europa.eu/health/sites/health/files/scientific_co...

[3] https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD...?

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