How Blue LED Lights Are Harmful to Health

The effects of modern outdoor lighting and the screen light of technical achievements such as smartphones, tablets and the like harm not only our eyes, but also our well-being , What manufacturer and policy for countermeasures and how the consumer can protect themselves.

LED lamp casts a blue light on a black background


Most of the world’s population uses computers, tablets or smartphones almost every day. But that is not the only reason why blue artificial light becomes a constant – and usually not necessarily consciously perceived companion. In the dark, people are also exposed to the artificial light of street lamps, electronic billboards, car and bicycle headlights, and LED lights in living room lamp sockets. All modern artificial light sources have one thing in common: they contain a proportion of synthetically produced blue light. In its natural form, this is also in the electromagnetic spectrum of the sun, but like so many, the dose makes the poison.

Studies show negative influence of blue LED light

Negative influences on the human organism are proven in science and research. The following happens in the body: The blue light pretends to the brain that it is daytime. The brain then subdivides thereupon the sleep hormone melatonin. This is why people who are exposed to artificial light have a livelier and more efficient effect. From a biological point of view, however, there is no direct benefit.

In the long term, the excessive consumption of blue light has a negative effect on the biorhythm. Due to the artificially produced, much too low melatonin secretion, the human brain is overwhelmed. This results in restlessness and memory disorders to withdrawal symptoms and massive sleep disorders. This in turn leads to distress and can bring bad consequences, such as chronic diseases, heart disease or possibly cancer. Studies on certain symptoms are currently being prepared and carried out.

Disturbance factor blue light and the effects on the human eye

The human eye contains cones that are suitable for color vision in the spectrum red, green and blue (RGB) are responsible. The proportion that the blue-sensitive cones contribute to color perception is about 12%. However, this component does not concentrate in the center of the retina, such as the red and green cones, but in the outer areas of the retina. This blue light is rather annoying and dazzling. In addition, the high energy of the short-wave rays over a longer period phototoxic and can kill the visual cells in the most important Quadratviertelmillimeter – the macula.

Especially the age-related macular degeneration is affected. In the elderly, a toxic sub-form of vitamin A collects as a deposit on the RPE layer – a light filter between the retina and the choroid. Cells affected by this white-yellowish layer are particularly sensitive to blue light.

Blue light from the perspective of manufacturers and politicians

A significant part of politics is turning to climate protection. To achieve these goals, the government is currently relying on LED lighting. This is also the reason why, with the reforming of the street lighting, the conventional sodium vapor lamps have been abolished and replaced by light emitting diodes (LED lamps). These are not only cheaper from an energy point of view, but contribute according to the standardization committee lighting technology of the DIN (German Institute for Standardization e.V.) by their intensity also to the safety in road traffic. Since the beginning of the year, government subsidies have even been granted for refitting in the public and private sectors. The consumer can determine the color temperature of the light source himself and is not bound by state regulations.

Manufacturers of LED lighting systems are currently benefiting from state subsidies and sticking to EU standards in production.

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