What is LED light?

Do you have those fairy lights decorating your bed room, giving it a dreamy feel?

Aren’t those absolutely magical? The golden fairy lights blinking like fireflies in the dark. I imagine that they are my own personal stars.

Have you ever wondered what these lights actually are? From a scientific point of view? If not, then keep reading this article to know more about those fairy lights making your room magical.

First let’s get the basics straight. LED lights stand for Light – Emitting Diode. LEDs are semiconductors that, like any other semiconductor, give out light whenever electric current is passed through them. If you remember your elementary physics, then, conductors are those substances through which electric current can pass without any resistance. For example, metals like iron, aluminum, steel and many more.

Strain your memory and you will remember what insulators are. Insulators are those substances through which electric current cannot pass. For example, rubber, plastic and many more such substances. Now, semiconductors lie somewhere in the middle of this scale. Semiconductors are substances through which electric current can pass but not as easily as a conductor.

How is light produced from a LED?

Your next question would be how is light produced when electric current is passed through a semiconductor? The semiconductor gives out light when the electrons of the device come together and form a unit.

What are the materials that contribute in giving out different colors of light?

We all know and we all have seen LED lights of different colors like yellow, white, blue, purple, pink etc. What makes these different colors from the same semiconductor? Obviously, there are different materials used. Let’s see what those materials are:

  • Gallium Phosphide is used to give out light the colour of yellow and green.
  • Aluminum Gallium Indium Phosphide is also used to give out light the color of yellow, orange and red.
  • Indium Gallium Nitride is used to give out light the colour of blue and green.
  • Aluminum Gallium Arsenide is used to give out light in the colour of red. This material is also used for infrared light for special uses.

Why should you adopt LED lights for your home?

We have established and understood what LED lights are, but the question arises should I start using these lights at my home? If yes, then why? I have a perfect set of well working and efficient bulbs and tube lights so why should I adopt LED lights? I have a good answer for this question. LED lights have the benefit of a lot of things. Let’s see below.

  • LED lights consume less power: LED lights are known to be energy efficient as they consume less power as compared to other light alternatives like CFL, sodium vapors and many more. It is said that LED lights save up to 90 % of electricity hence; the power consumption is far less than any other light bulbs.
  • LEDs have increased longevity: Unlike CFLs, LED lights have been known to have increased life span. LEDs are made in such a manner that makes them generate electricity and emit light in a completely different manner than other mainstream light bulbs. All things like the durability, strength and energy efficiency matter. These three aspects rate high in a LED bulb which inevitably gives it a long life. LEDs are known to work consistently for up to 50,000 hours if they are used properly.
  • LEDs are safer: Whenever it comes to lights and electrical appliances, our biggest concern is safety. Getting electrocuted is very easy if you are dealing with faulty or risky appliances. LEDs are energy efficient and so don’t consume that much power. There is almost no heat formation with LEDs which in turn decreases the chances of electrocution and automatically increases safety. This said, LEDs are the best option for a house filled with children and pets.
  • LEDs are compact in shape: LEDs are very versatile in the sense that they are suitable for almost all places. This ability of fitting in dynamic spaces is achieved by its small and compact shape and size. This brilliant adaptability makes LED famous and attracts more customers day by day.
  • LEDs give out single or one directional light: If you compare torch light to bulb light, what do you see? The beam of the torch light is stronger and more concentrated than the light coming out of a bulb which is more dispersed. By this example what I want to say is that LEDs emit more concentrated light (not as concentrated as a torch light) which helps to make things more visible and to light the room better. LEDs emit light in 180 degrees while other bulbs emit light in 360 degrees which makes things less visible and more dispersed.
  • LEDs are eco – friendly: LEDs are made of different materials unlike our traditional CFL bulbs which have mercury inside them. At the end of the bulb’s lifespan, mercury makes it difficult to dispose off in such a manner to not cause any problem for the environment. LEDs have no such mercury ridden materials making it easy to dispose off when need be.
  • LEDs have instant light emission capacity: Unlike other traditional bulbs that take about a minute to emit light when you switch them on, LEDs have the capacity to emit light as soon as you switch them on. Also LED lights don’t give trouble when they are frequently switched on and off. This shows efficiency and reliability.


LED lights are the best light option in the 21st century by being eco – friendly, fast, durable, reliable and efficient. LED lights are a good investment as they don’t give much trouble if used properly and actually dip your electricity bill because they use nominal voltage power. These are good if you want to stick to a budget and prove to be long companions with their long-life span. Let’s be updated and not forget to walk hand in hand with the rapidly advancing technology.

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