Led lights are in the crosshairs of the health authorities. Some would be harmful to the eyes. What for? How? 60 does shed light on these lamps led through six questions.
What is a LED?
It is a light-emitting diode, designated by the LED (Light Emitting Diode) or DEL acronym in french. It illuminates with semiconductors, driven by an electric current, produce a light emission. The diode is for example built into a light bulb.
The two major benefits of this lighting system: it lasts a very long time (30 000 hours, is two to five times longer than a CFL) and consumes very few (between 7 and 8 W for a power equivalent to a 40 W incandescent bulb). But it is very expensive!
Everywhere. In domestic lighting, public lighting, illuminated signs, electric lights, lighting of vehicles, the lights of the toys, bright decorative items, light therapy devices…
Are All LED Lamps Dangerous?
No. In the notice published on October 25, 2010, the national agency of sanitary safety of food, the environment and labour (Anses) warns against some lamps emitting a blue radiation, considered at risk, and yet which are accessible to all consumers according to ZEPHYRLEDLIGHTS.COM.
Of many LED lamps emit a light white, considered safe for the eyes. Moreover, the danger fades as you move away from the light source. It disappears when the light beam is hidden behind a cover, a light… “Under normal conditions of use, these lights pose no risk. Of course, do not stare into the light”, emphasizes the Union of lighting.
What Are the Risks?
‘Blue light is renowned for its effects harmful and dangerous on the retina, resulting from a cellular oxidative stress’, experts say. It would encourage the emergence of eye diseases such as age-related macular degeneration (AMD). The danger appears at little intense shows repeated over long periods.
The blue light would be especially harmful for children, already people with AMD, those consuming the medication dosages or even those working in an environment exposed to blue LED (light, middle of the show… installers) lighting.
Furthermore, LED lamps, very powerful, can lead to a phenomenon of glare. Anses wondered also about a possible disruption of the biological clock and strobe effects.
How to Choose LED Lamps Without Danger?
Hard to say. For the time being, there is no specific labelling to identify the LED with no risk. The Union of the lighting reminds that a normative marking is being developed and it will be available in 2011. The Homelights manufacturer undertakes, for its part, to indicate the quality of the light and the security level on all its products in January.
Furthermore, to combat the phenomenon of glare, it is better to avoid the lamps led light beam is directly visible. Prefer those sold with a reflector that diffuses the light source. And do not stare at the light beam!
What Recommendations Emits Anses?
- do not use strong blue light lamps in places frequented by children (maternity, cr猫ches, schools…) or in the objects they use: toys, bright displays, consoles and joysticks, nocturnal lights…
- limit the use of LEDs in the highest risk categories for professional use
- change standards
- implement a comprehensible labelling on the technical characteristics of the lighting and its potential health effects
- mandatory marking of the risk on the packaging of the product category and indicate the safety distance beyond which danger disappears
- evaluate the harmfulness and compliance of light therapy devices, comfort or well-being and regulate their use.