No, they absolutely do not pose a health risk in this manner, despite some very scary claims being made (including some referenced in other answers to this question).
The sole concern regarding LED lighting is the possible effects of blue (just blue, not ultraviolet) light emitted by these bulbs. (“White” LED bulbs are actually blue LEDs with yellow phosphor either coating the LED itself or within the encapsulating material.)
But we need to realize that the blue light emitted by these devices is far less intense than the blue component of ordinary sunlight – if LED lighting was inherently dangerous as is being claimed, exposure to sunlight would be deadly.
Where the scares have come from is a misinterpretation of some research that has been done in this area. It seems that humans actually have a fifth type of receptor in the retina, besides the familiar three types of cone cells and the rods.
These are some blue-sensitive cells which do not seem to be primarily dedicated to vision, but rather to helping regulate the body’s sleep cycles. By detecting blue light only (something which in the natural word is of course present in sunlight but not in other “natural” light sources such as firelight), these cells basically tell the brain whether it’s daytime or not. Artificial lighting that contains a lot of blue light basically confuses this system, and messes up sleep cycles – and that can result in some health problems if it goes on for too long. But the blue light exposure itself is not directly causing the problems.
So the bottom line is that “blue light” exposure from our monitors, smartphones, and other tech is no problem at all when it occurs during our normal waking hours.
The problem comes if you subject yourself to this type of lighting routinely when it’s close to or after your bedtime. The solution, of course, is simple – put away your tech (or at least use one of the apps or filters that reduce the blue content) when it’s getting close to bedtime. Apart from that, don’t worry about it.
Energy-saving lamps are a common item in our daily lives. Indoor lighting, reading and reading are inseparable from it. Recently, the use of energy-saving lamps has caused many people to worry. On the Internet, an article called “Scientists Emergency Exposure!
The article about the use of terror carcinogens in the Chinese family every day is widely forwarded. The article pointed out that the ultraviolet radiation released by energy-saving lamps can cause skin cancer, the contents of mercury will cause death, and will release a variety of carcinogens after power-on. All kinds of statements make people shudder. So, are these statements true? Can energy-saving lamps be used with confidence?
“The ‘super cancer source’ that induces a variety of cancers”, “It doesn’t matter the shape! No matter the brand! As long as it is an energy-saving lamp, it may cause cancer!” This is the sensational two words in the recent hot biography.
In an article called “Scientific Emergency Exposure! This article in the Chinese family’s daily use of drugs, including terrorist carcinogens, lists a variety of safety hazards of energy-saving lamps, including: it can induce breast cancer, melanoma, lead to mercury poisoning, release of naphthalene, phenol and benzene.
Toxins such as ethylene. In order to increase credibility, the net posts also quoted reports from foreign media on the matter, and even experimental reports on experiments conducted by foreign scientific research institutions on energy-saving lamps. Everything seems to be inconspicuous.
Associate Professor of the Department of Applied Physics, East China Jiaotong University Zhang Jiansong: The biggest advantage of energy-saving lamps as the name suggests is energy conservation. Its life is much higher than our usual incandescent lamps. The principle of energy-saving lamps and incandescent lamps is completely different. Inside the incandescent lamp, he is a tungsten wire.
When the current passes, the tungsten wire will release a lot of heat and heat, and the tungsten wire will sublimate. When the tungsten wire is sublimated, it will emit light. So what are the disadvantages? The first one will release a lot of heat and power loss, because in many cases we use incandescent lamps for lighting. The second one is easy to catch fire, and there is no such trouble in energy-saving lamps.
Today, energy-saving lamps have become an indispensable part of our lives. The reporter looked at the office roughly, and almost all the lighting equipment used was the energy-saving lamp. However, the net post lists the energy-saving lamps that have strong radiation when they are used. When people are in this environment for a long time, they are “seeing their cells killed”! So, does the energy-saving lamp really emit ultraviolet light and radiation?
Associate Professor Zhang Jiansong, Department of Applied Physics, East China Jiaotong University: This is certain. Because whether it is an incandescent energy-saving lamp or an LED lamp, it is normal to release electromagnetic waves. The main difference may be to say who is bigger and who is smaller. The second is whether he has reached the amount that can harm our body. For example, we generally stipulate 50 volts per meter. Below this is OK.
Ophthalmologist: LED light has a large amount of blue light in the spectrum, high energy, long-term use will cause vision damage. Ordinary energy-saving lamps have stroboscopic light, which is easy to cause visual fatigue. For students who use their eyes for a long time, it is most suitable to choose energy-saving lamps without stroboscopic or high-frequency flash. The light should also be soft and the color temperature should be neutral.
The lights decorate our world and illuminate our night. In the future, how to make the lamp more comfortable, more energy-efficient and more environmentally friendly should be the direction of improvement. I think that the introduction of any qualified product has been demonstrated by many parties and has supervision from multiple departments. We can use it with confidence.