Benefits of High Power LED Lighting
Welcome to this information page Mppt Solar. On this page we discuss the future of lighting: the high power LED lighting. It can be used in many applications, from street lights to car headlights, lamps of illuminated with spotlights to illuminate the interior of the camper and the house. We will explain the advantages of this new technology, as is the emission of light and substances which determine the color of the light. The LED lighting is a very important element to consider when designing a photovoltaic and / or wind power for your home, camper or boat.
I believe that we all have replaced our old incandescent lamps with fluorescent lamps, also called energy-saving lamps. Fluorescent lamps have no doubt better light efficiency than incandescent ones but there is a new type of lighting that is emerging in the market: the LED lighting. Thanks to the unstoppable development of the LEDs and above all the power LEDs in the last few years, the technology of the various lighting devices has undergone enormous change for some time due to its great advantages.
Let's see some areas mainly interested in this important change:
• Lamps for public street lighting: There are in fact growing along our streets more and more street lamps with LEDs powered by photovoltaic and wind power, self-supporting energy-saving lamps. These installations are favored by: no energy cost, maximum security from lightning, reduced plant maintenance, no digging with road safety, no blackout problem, all for the benefit of the environment and society.
• Car headlights: the installation of LED headlights in the car is increasing considerably since it has been found that there are many advantages such as the absence of heat production, long life (it may never be necessary to replace them) and ignition (Immediate warning of braking and other warning signs).
• Spotlights for interior lighting, home camper: excellent for reducing energy consumption of the house and then to save on your electricity bill. The LED spotlights are ideal especially in caravans, where there is the need to reduce waste to a minimum. One of the advantages in this type of lighting is the possibility, via a trimmer, to be able to adjust the light intensity of the LED spotlights. Finally, LED spotlights do not have annoying flickering of the light beam as it have the bulbs.
In summary, what are the advantages of LED lighting?
The advantages that are making now irreplaceable LED lighting are numerous, but can be summarized in these points:
• high luminous efficiency (and therefore reduced power consumption)
• low heat
• longer duration of life compared to traditional light sources (over 50,000 hours average life)
• absence of light pollution (light-free component infrared and ultraviolet)
• low voltage operation (also be fueled by a battery)
• ability to adjust the light intensity by a potentiometer
• ecocompatibility (absence of lead and heavy metals)
How does light emission occur in a LED diode?
In LED diodes, light emission is obtained by applying a voltage slightly above its threshold value to the diode junction, which may vary depending on the diode used. The direct current passing through the diode causes a recombination of electric charges in the junction due to the presence, in the silicon plate, of molecules of particular substances, called impurities. It is precisely this recombination that results in the emission of light, whose composition depends strictly on the type of impurity used to doping the semiconductor material that constitutes the junction. For information purposes, two techniques are mainly used for white light: additive synthesis and fluorescence substance excitation.
What are the substances that determine the color of the diodes?
Below you will find the various compounds used to doping the chips in relation to the wavelength of the light emitted and thus to the color that is obtained. For wavelengths ranging from about 780 nanometers to 1 mm, we find infrared rays, very useful in electronics in a number of applications (pyrometric sensors, night vision, remote controls, ...).
|Indium Gallium Nitride||InGaN||340 - 500 nm||UV, Blue, Green|
|Silicon Carbide||SiC||460 nm||Blue|
|Gallium Phosphide||GaP||550 nm||Green|
|Aluminium-Gallium Phosphide||AlGaP||560 nm||Yellow, Green|
|Aluminium Arsenide||AlAs||590 nm||Yellow|
|Aluminum-Gallium-Indium Phosphide||AlGaInP||540 - 760 nm||Green, Orange, Red|
|Aluminum Gallium Arsenide||AlGaAs||770 - 870 nm||Red and Infrared|
|Gallium Arsenide||GaAs||870 nm||Infrared|
|Indium Phosphide||InP||930 nm||Infrared|
|Phosphide-Arsenide of Gallium-Indium||InGaAsP||1.100 - 1.670 nm||Infrared|
LED Packaging for Lighting Applications
Practical Lighting Design with LEDs
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