LED's contribute more to light pollution

LEDs contribute more to light pollution

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While the number of luminous points continues to increase considerably in the world, contributing to light pollution, the democratization of LED lamps further accentuates this trend. However, the blue component of "white" LEDs is more diffused in the atmosphere and "causes 10x halos higher than those of sodium light with equal light output. They are also more dazzling, always at the equal light output: this has a tendency to close more the retina and thus limit the entries of light: this illuminates so much, but in the end, one sees less well ", specifies the association of astronomers Aver.


Are LEDs really dangerous to health?


ANSES warns consumers about the health risks associated with the high proportion of blue light emitted by cold white and blue LED lighting. Populations that are particularly sensitive to risk or particularly exposed to blue light have been identified, such as children, people with certain eye diseases or even certain populations of professionals subjected to intensive lighting.

However, the lighting trade union nuances the risk: "are only concerned with certain high power LED sources reserved for professional applications (high-rise outdoor lighting, for example).They are not available for sale for uses of normal lighting inside buildings, and safety provisions are made for their use. "
In addition, "all manufacturers of luminaires and LED bulbs must verify that their products do not emit too much blue light, for this they use methods defined in the European standards NF EN 62471, and IEC / TR 62778 The CE marking affixed to these products commits the manufacturer in compliance with the regulations ". Explains the Union.

There is also a risk of glare. ANSES, therefore, recommends reducing the luminance of LEDs, in particular by means of optical devices or adapted luminaires.

Finally, it is recommended to stand more than 20 cm from an LED light source. According to a study by the University of Madrid, blue LED lamps could irreversibly damage the cells of the eye. However, the conditions that led to these results are unlikely to be met: to be exposed to blue LED lamps with a brightness equivalent to a 100 W incandescent lamp, 20 cm away for 12 hours.


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