Light from light-emitting diode (LED) lamps may present some health hazards to the eyes. Here’s how to preserve them.
The bluish and cold white LED bulbs can damage the eyes under certain conditions of use.
The cold white LEDs involved
LED bulbs (light-emitting diodes), dangerous for the eyes? You will hear about it regularly, but you have to know what you are talking about.
There are indeed LED bulbs, and LED bulbs. The first generation of LED bulbs produced white, cold, even slightly bluish light.
It is these bulbs which can damage the sight, in the long term, by progressively or slyly damaging the external retina, and the pigments located at the bottom of the eyes that capture the blue color.
These LED bulbs, and white, cold, or bluish light, are very popular in Asia, a matter of culture. But much less used in Europe!
The cold white LED bulbs are to be reserved for certain uses
The second generation of LED bulbs offers a white, warm light. Look at packaging, or descriptions on the Internet! Sometimes this notion of cold white or warm white is indicated in Kelvin, the international unit of measurement used to measure “color temperature”.
If the bulb you want to buy, or use, displays between 2,200 and 3,200 Kelvin, then you are in the presence of a light bulb that is white and warm.
If, on the other hand, the bulb in question displays 5,000 Kelvin or more, it is a cold white light!
Should we ban white LED bulbs? No! But it is necessary to reserve them for certain uses, for example the lighting of a painting, because this light allows to enhance the colors, to bring out the perspectives, when a warm white tends to smooth everything.
This is what you really need to know about LED bulbs. Warm white: it’s all good. Cold white: to be reserved for certain uses!
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