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."
