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LED (Light emitting diodes) Lighting is an energy saving option and contributes to the fight against global warming and environmental pollution cause by mercury present in the traditional fluorescent lamps.
How do LEDs produce white light?
Use of LEDs for lighting purposes saves energy but LEDs that directly emit white light do not exist! White LEDs are commonly produced by coating phosphors (or photoluminescent materials) onto blue or ultraviolet (UV) LEDs chips. In this way, the light from the blue LED chips (for example) mixes with the light emitted by the phosphor material to form white light. White light is also produced when, red, green and blue (RGB) LEDs are combined together but this method is very expesnsive.
The conmmercially preferred mehod is the phosphor converted white LEDs.
LED Phosphors are luminescent materials that convert Ultra-violet (UV) or blue LEDs into white light. The most common commercial white LEDs are produced by using blue LED chips coated with a yellow phosphor. Phosphors are further used to fine tune the type of white light produced by LEDs, i.e., cold white or warm light.
Most of the commercial LED phosphors in the market today contain critical rare-earth materials which are facing high supply risks due to geopolitical reasons. Their production also polutes the environment.
Baotou (China) is the global capital for rare earth elements
Image from Sky News: accessed on 23.03.2023
LehMoSense offers the solution:
LehMoSense offers new alternative LED phosphors that are free of rare-earth metals and produced locally in an environmentally friendly method at even lower cost.
Benefits of LED phosphors from LehMosense
Sustainability in a clean environment
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