LED desk lamp is a desk lamp that uses LED (Light Emitting Diode), which is a light-emitting diode, as a light source. LED is a solid-state semiconductor device that can directly convert electricity into light. The LED lighting technology it uses is the third generation lighting technology
LED lighting, also known as solid-state lighting, is the third-generation lighting technology after incandescent lamps and fluorescent lamps. It has the characteristics of energy saving, environmental protection, safety and reliability. Solid-state light source is a new type with great potential to replace traditional lighting appliances in the next ten years. The light source represents the future of lighting technology. The development of new solid-state lighting is not only a revolution in the field of lighting, but also meets the requirements of the current government to "build a resource-saving and environment-friendly society".
In addition, there is another point. The longer the LED light is turned on, the faster the phosphor in the light source decays. As a result, the light in the blue wavelength band that the human eye contacts becomes stronger and stronger, which causes damage to the human eye. Therefore, looking at the LED light source for a long time, it is easy to make people feel dizzy and uncomfortable, and even cause eye damage, so that the probability of suffering from eye diseases will increase. Remind, do not let your eyes stare at the bright LED light source for a long time to avoid damage to your eyes.
The reason why the white light emitted by the light source of the LED desk lamp can be formed is that the phosphor is excited by blue light with a wavelength of 450 ~ 455NM. The lower the wavelength, the stronger the firing ability. Usually the factory wavelength of the LED light source is controlled within 500NM, generally 450 ~ 455NM or 455 ~ 460NM, which belong to the section with the strongest radiation damage. If the wavelength becomes larger, the ability to excite the phosphor decreases, and the luminous efficiency decreases. In order to pursue brightness, manufacturers usually strengthen the blue light intensity of the LED light source. If the human eye looks at such a light source for a long time, it is inevitable that the eyes will be injured by blue light.