kmiainfo: Are energy-saving LED lights harmful to humans? Are energy-saving LED lights harmful to humans?

Are energy-saving LED lights harmful to humans?

Are energy-saving LED lights harmful to humans? White LED lights may cause health problems because they contain a large amount of blue light, so they are really effective in inhibiting melatonin.  In recent years, lamps known as "LED" or light-emitting diodes, which are promoted as energy-saving lamps, have spread, so that many countries have become dependent on them mainly in lighting homes, companies and streets.  But is this type of lamp safe for human health and wildlife?  Dark hormone and blue light Our bodies depend on the hormone melatonin to regulate the sleep-wake cycle along with other roles that are not fully known yet, and melatonin is a hormone naturally secreted by the pineal gland in the brain that releases the highest levels of melatonin in the dark and reduces its production when exposed to light, so melatonin is also known as the dark hormone That is, our bodies have low levels of melatonin in the blood during daylight hours and high levels during the night.  The pineal gland receives information about the daily cycle of darkness (day and night) from the retina and then releases melatonin accordingly, and previous research published in Progress in Brain Research in 2012 demonstrated that the level of melatonin produced in Our bodies are fed by a light-sensitive protein in our eyes called melanopsin. When certain wavelengths of light hit melanopsin it limits our melatonin production, messing with our body's natural sleep-wake cycle.  Previous research, also published in the journal “IEEE Explore” in 2013, linked exposure to blue light and the level of melatonin in the human body, as 5 participants were exposed to 3 cases of light by a computer screen with a backlit LED (“LED”) . No light, red light (∼650nm) and blue light (∼470nm) for 30 minutes, the results revealed that the blue light of an LED-backlit computer screen significantly reduced melatonin production (91%) more than red light (78%) and no light (44%).  With all this information in mind, Alicia Demovsky, a researcher from Australia's La Trobe University, conducted a study on how exposure to LED lighting affects a number of wallabies (a species of the order Macropods that are smaller than kangaroos).  LED lights damage In one reserve, the tamar whale was exposed to LED lighting and to “LED” lamps covered in blue in another reserve, while the wallabies in the third reserve experienced natural darkness, and after 10 weeks, the researcher took blood samples to test the melatonin levels of the wallabies.  "White LED lights cause problems, because they contain a large amount of blue light, so they are really effective in inhibiting melatonin," the Australian researcher says in an interview with the " Particle " website. The study also found that removing blue light from LED lights caused Significant difference in melatonin levels, it was found that wallabies exposed to amber LED light have levels of melatonin equal to those of wallabies that experience natural darkness.  In addition to its role in regulating the sleep-wake cycle, melatonin is also important for the immune system, as the hormone in mammals acts as an antioxidant, consuming free radicals, which are unstable atoms made by the body as a byproduct of various normal cellular processes, which despite their ability to damage DNA and cells Other than that, the body will function well with low levels of free radicals.  Apart from melatonin, wallabies and other animals depend on the changing level of light throughout the four seasons as a timer for vital processes such as reproduction.  Australian researcher Alicia Dimovsky says that "animals that reproduce at a certain time of the year - such as the tamar pulp - rely on this biological clock to ensure that birth occurs when there is enough food to raise their young, and it has been shown that many Australian mammals reduce their activity even under the sun. The full moon is due to an increased risk of predation, so even very low levels of light pollution can disrupt our wildlife."  The Western Australian Department of Biodiversity and Conservation (DBCA) publishes guidance for companies to reduce 'light pollution' but it has not yet been legislated or enforced, and a spokesperson for the Department says 'Western Australia's Biodiversity and Conservation Department is promoting the guidelines. Through education with industry and government agencies, to ensure best practices for lighting design and to reduce the potential impact of artificial light on wildlife.”

White LED lights may cause health problems because they contain a large amount of blue light, so they are really effective in inhibiting melatonin.

In recent years, lamps known as "LED" or light-emitting diodes, which are promoted as energy-saving lamps, have spread, so that many countries have become dependent on them mainly in lighting homes, companies and streets.

But is this type of lamp safe for human health and wildlife?

Dark hormone and blue light
Our bodies depend on the hormone melatonin to regulate the sleep-wake cycle along with other roles that are not fully known yet, and melatonin is a hormone naturally secreted by the pineal gland in the brain that releases the highest levels of melatonin in the dark and reduces its production when exposed to light, so melatonin is also known as the dark hormone That is, our bodies have low levels of melatonin in the blood during daylight hours and high levels during the night.

The pineal gland receives information about the daily cycle of darkness (day and night) from the retina and then releases melatonin accordingly, and previous research published in Progress in Brain Research in 2012 demonstrated that the level of melatonin produced in Our bodies are fed by a light-sensitive protein in our eyes called melanopsin. When certain wavelengths of light hit melanopsin it limits our melatonin production, messing with our body's natural sleep-wake cycle.

Previous research, also published in the journal “IEEE Explore” in 2013, linked exposure to blue light and the level of melatonin in the human body, as 5 participants were exposed to 3 cases of light by a computer screen with a backlit LED (“LED”) . No light, red light (∼650nm) and blue light (∼470nm) for 30 minutes, the results revealed that the blue light of an LED-backlit computer screen significantly reduced melatonin production (91%) more than red light (78%) and no light (44%).

With all this information in mind, Alicia Demovsky, a researcher from Australia's La Trobe University, conducted a study on how exposure to LED lighting affects a number of wallabies (a species of the order Macropods that are smaller than kangaroos).

LED lights damage
In one reserve, the tamar whale was exposed to LED lighting and to “LED” lamps covered in blue in another reserve, while the wallabies in the third reserve experienced natural darkness, and after 10 weeks, the researcher took blood samples to test the melatonin levels of the wallabies.

"White LED lights cause problems, because they contain a large amount of blue light, so they are really effective in inhibiting melatonin," the Australian researcher says in an interview with the " Particle " website. The study also found that removing blue light from LED lights caused Significant difference in melatonin levels, it was found that wallabies exposed to amber LED light have levels of melatonin equal to those of wallabies that experience natural darkness.

In addition to its role in regulating the sleep-wake cycle, melatonin is also important for the immune system, as the hormone in mammals acts as an antioxidant, consuming free radicals, which are unstable atoms made by the body as a byproduct of various normal cellular processes, which despite their ability to damage DNA and cells Other than that, the body will function well with low levels of free radicals.

Apart from melatonin, wallabies and other animals depend on the changing level of light throughout the four seasons as a timer for vital processes such as reproduction.

Australian researcher Alicia Dimovsky says that "animals that reproduce at a certain time of the year - such as the tamar pulp - rely on this biological clock to ensure that birth occurs when there is enough food to raise their young, and it has been shown that many Australian mammals reduce their activity even under the sun. The full moon is due to an increased risk of predation, so even very low levels of light pollution can disrupt our wildlife."

The Western Australian Department of Biodiversity and Conservation (DBCA) publishes guidance for companies to reduce 'light pollution' but it has not yet been legislated or enforced, and a spokesperson for the Department says 'Western Australia's Biodiversity and Conservation Department is promoting the guidelines. Through education with industry and government agencies, to ensure best practices for lighting design and to reduce the potential impact of artificial light on wildlife.”

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