1) what is LED? How does it work?
LED is the abbreviation of the English word Light Emitting Diode, the Chinese name for the light-emitting diode, is a way to
convert electrical energy directly into visible light semiconductor devices
LEDs are light emitting diodes; everyone seems to know that right? But how or why do they emit light? An incandescent lamp
produces light when electricity flows and heats a filament in a gas sealed lamp. Fluorescent lamps emit light when voltage is
transmitted by electrodes that allow electrons to excite phosphors as they pass from one end of a tube vacuum to the other,
but what about LEDS? If there is no gas, filament, phosphor, vacuum or arc, how do they produce light?
LEDs produce light in a very unique way; they produce light via a process called Electro-luminescence, huh…..?
Electroluminescence is a rather complex process that starts by turning a semi conductor material into a conducting material
.
We know that many metals like copper conduct electricity so they are known as conductors, and there are materials that never
conduct, rubber for example does not conduct electricity, so it is known as an insulator, but there are materials known as semi
conductors that under normal conditions don’t conduct, but under the right circumstances can conduct electricity
Let me give you a very simplified explanation of how and why semi conductors conduct electricity. I apologize in advance to any
quantum physicist or PHD Electrical Engineer who may object to this over simplification of a very complex process; like one of
them is going to read my blog, right.
Everything in the universe is made up of atoms, and atoms have a positively charged nucleus and negatively charged
electrons. Some atoms have more electrons and others have less. For example, an LED semi-conductor atom is typically
a silicon crystal that has 4 electrons and all of the atoms bond perfectly to their neighbors, leaving no free electrons
(negatively-charged particles) to conduct electrical current. But, when you dope the silicon material by introducing an impurity
that changes the balance, either adding free (extra) electrons or creating gaps (holes) where electrons can go, either of these
additions make a semi conductor material conductive.
A semiconductor with extra electrons is called N-type (negative) material, since it has extra negatively-charged electrons.
In N-type material, free electrons can move from a negatively-charged area to a positively charged area. Remember, opposites
attract!
A semiconductor with extra holes is called P-type (positive) material since it has extra positively-charged gaps called holes.
When excited with current the negative electron leaves its atom and the P-type material’s positive attraction draws the free
negative electron into its hole, and the hole also moves toward the electron, so on and so forth. As an electron travels to a hole,
it carries energy, but in order to fit into the hole it must release any extra energy, and when it does, the extra energy is released
in the form of a photon (light).
To understand this, imagine a metal marble being drawn between two different materials towards a magnetic hole that is also
moving towards the marble, and when the marble gets to the hole it creates a spark (light) as it falls in to the hole. When we
maintain a steady flow of electrical current to the diode, it continues the process of allowing electrons to flow from the negative
charged material and fall into the positive charged holes which maintains a steady stream of light out of the LED.
2)Benefits of LED Lighting
LED Lighting is More Efficient
One of the main benefits to LED lighting is that it is more efficient. You can get more life out of each bulb and it is also energy
efficient so it helps the environment, too. When it comes to LED lights, you’ve probably seen these before even if you did not
realize what you were seeing.
Longer Lifetime
Yet another one of the best benefits of LED lighting is that they are built to last. They have a much longer lifetime than your
average bulb and you can use this to your advantage in many ways. Not only does it help you save from purchasing and
replacing lights but it also means you can put them in places that are more difficult to reach or would be more trouble to
replace often. Now that you can see some of the most common benefits of LED lighting, it’s a bit easier to see why more and
more people are choosing LEDs for their lighting options. It just makes sense when you can get more for your money and get
a longer lasting, more efficient light source instead。
Not Restricted by Size
Another great benefit to LED lighting is that there are fewer to no restrictions on size. Unlike other types of lighting, LEDs are
not restricted by size. They can be as small as 2mm in size or less which makes it possible to use them in places you could
not use an ordinary bulb or lighting source. This opens up many doors of opportunity to how you will use your LEDs.
Variety of Color
Another benefit to LED lighting is that it is easier to get a wide array of color that cannot always be done with regular bulbs.
They don’t require filters to produce the different colors, due to how the diodes are constructed. This makes it much easier
to get them in nearly any color you can think of, even neon shades.
3) Classifications of LED Lighting
Residential LED lighting
Office LED lighting
Retail LED lighting
Commercial LED lighting
Industrial LED lighting
Architectural LED lighting
Decorative LED lighting
Among all,LED industrial lighting is our main products,including LED flood lights,LED high bay lights,LED tunnel lights
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