Como proteger o sono:
https://www.bbc.com/portuguese/noticias/2015/02/150129_luz_dormir_lgb
Citando:
""Não há necessidade de ser uma lâmpada especial, mas o melhor é procurar as que produzem uma luz mais azul, ou seja, com uma temperatura de cor correlata ou correlated color temperature ou cct de 6500 (Kelvin) ou superior"."
https://returntonow.net/2017/11/15/dark-side-led-lighting/
Citando (FFR):
"When buying bulbs, look at their CRI or color rendering index, Wunsch says.
Sunlight, which is the gold standard, has a CRI of 100. So do incandescent bulbs and candles. If you must buy LED bulbs, look for a CRI of 97, which is the closest they come to natural light.
LEDs are the most dangerous at night, Wunsch says, as there is no counterbalancing red light. The biological risks of artificial light are somewhat mitigated if you have plenty of sunlight streaming through windows, but if that’s the case, why have lights on at all?"
(...)
"While LEDs (light-emitting diodes) are up to 95 percent more energy efficient than incandescent bulbs, we are paying for that savings with our health.
A physician and lecturer at Wismar University in Germany, Alexander Wunsch is an international consultant to governments, medical facilities and the lighting industry.
His message, though often ignored, is clear: blue light, isolated from all the other colors on the light spectrum, is damaging our retinas and disrupting our endocrine systems, resulting in all sorts of physical and mental illness.
It’s not a message the LED industry, governments looking to cut carbon emissions, or consumers saving money on electricity want to hear. But, as this Harvard Medical School report says, it is “backed up by study after study.”
Natural light vs. LED light
Natural light gives off all the colors (wavelengths) of the rainbow in a somewhat continuous manner, Wunsch explains in an interview with Dr. Mercola."
Tá a ligar o night mode o dia todo s.f.f.:
http://www.foxnews.com/health/2018/08/13/blue-light-from-phone-screens-precipitate-blindness-study-finds.amp.html
Citando:
"A study published recently in the journal Scientific Reports details the process by which prolonged exposure to blue light causes a “toxic” chemical reaction in the retinal molecules and can kill photoreceptor cells.
"It’s no secret that blue light harms our vision by damaging the eye’s retina," said UT professor Ajith Karunarathne, one of the study's authors. "Our experiments explain how this happens, and we hope this leads to therapies that slow macular degeneration, such as a new kind of eye drop."
He advises to avoid browsing on mobile phones or tablets in the dark. Also, newer iPhones and Androids have a "Night Shift" or “Night Mode” feature that reduces the emission of blue light from device screens in the evening hours.
“Photoreceptor cells do not regenerate in the eye. When they’re dead, they’re dead for good,” said Kasun Ratnayake, a PhD student who was involved in the study.*
http://exameinformatica.sapo.pt/noticias/insolitos/2018-07-24-Ellumi-LED-as-luzes-que-matam-microbios-bolor-e-bacterias
Citando:
"Segundo a Ellumi, é possível eliminar bactérias, fungos e bolor com o virar de um interruptor. A empresa apresentou um conjunto de luzes LED que usam tecnologia de uma startup da indústria médica, a Vital Vio. O “truque” está na emissão de uma luz branca, ao invés de ultravioletas, num comprimento de onda de 450 nanómetros. Estas especificações são inofensivas para um ser humano, mas eficazes para eliminar micróbios, bolor e fungos, noticia a Cnet."