What Does Led Stand For and How Does It Work - Short Guide

Deyan Georgiev
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Updated · Apr 20, 2023

Deyan Georgiev

Website Manager | Joined October 2021

Deyan has been fascinated by technology his whole life. From the first Tetris game all the way to Fa... | See full bio


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There was a time when the everyday conveniences of today’s technology were hard to imagine. One of those was the incandescent bulb, which transformed our lives tremendously.

Now another technological game-changer has emerged – LED. There is a good chance you’re reading this article through lights emitted by LEDs. Now they’re everywhere and (without exaggeration) are changing the world.

But what does LED stand for

Let me explain.

What Does LED Stand For?

The LED acronym stands for Light-Emitting Diode. The diode is an electrical component used in many technologies, such as TVs, radios, and computers. It’s built to emit bright light when an electric current passes through it.
LEDs were put into use in the sixties when they were an exciting but expensive new technology. People used them in handheld calculators and other similar devices. 

With development and research, the technology advanced until it reached its current form. 

LEDs are now more efficient and cheaper. We see them in many lighting applications and all sorts of devices. Many kinds of them exist – from high-powered to miniature ones along with multicolored variations, and many others.
LED technology is taking over the industry for a reason – with its efficiency and reliability, it surpasses incandescent lights in every category.

How Do LEDs Work?

The function of LED is similar to the standard incandescent bulb’s, except LEDs contain no filament and can be much smaller.

An LED bulb produces light by passing an electric current through a semiconducting metal element – the diode. It then emits photons, which are the particles of electromagnetic energy we see as light. That happens through the principle of electroluminescence (material emitting light when an electric current passes through it).
Different semiconducting materials in the diode produce different light colors and intensities.

What Is LED Used For?

Nowadays, we’ve found a wide range of utilizations, including:

  • Light bulbs: LEDs are on their way to replace incandescent light bulbs. With time, we see fewer fluorescents too.
  • Displays: Even in the early days, people used LEDs in calculators, watches, advertising signs, and transportation displays. Now they’re the standard in modern screens, from touchscreen mobile phones to TVs. 
  • Other applications: We use them in all kinds of appliances and consumer electronics. The infrared transmitter on your TV remote control is an LED. They’re also used in indicator lights, laser devices, automotive headlamps, machine vision systems, etc.


The real impact of LED technology goes well beyond our brightly lit gadgets. 

When it comes to energy efficiency, it’s a real problem solver. They have proven to be the most efficient bulbs. 

According to the US department of energy, LED bulbs use at least 75% less energy than incandescent bulbs and last up to 25 times longer. That’s because incandescents lose up to 80% of their energy in the form of heat. LEDs are also more efficient than CFL (compact fluorescent lighting) bulbs and have double the lifespan.
Why is LED’s efficiency so important? Lighting accounts for 20-30% of global electricity consumption and 6% of greenhouse gas emissions. LED lighting has the greatest potential impact on energy savings globally. 


The small, energy-efficient light-emitting diodes started a lighting revolution and are now part of almost every electronic gadget. Without them, much of what we use today wouldn't be possible.

LED’s efficiency has proven to be superior to other light technologies, and the positive implications of that go beyond saving on your electricity bill. With global warming generating catastrophic effects on the planet, the need for energy efficiency is bigger than ever.


Why are LED lights better?

LED lights are superior because they’re much more energy-efficient and last a lot longer than incandescent or fluorescent lights. This means you save money – both on electricity bills and bulbs as consumables. 

Do LEDs attract bugs?

Bugs, by nature, are attracted to all kinds of light, and it’s true that LED lights can also draw them out. However, they attract them less than other types of lighting because they produce low heat and long wavelengths of light. That makes them perfect for an outdoor lamp.

What does LED stand for in a TV?

First, you need to know what does LED stand for in general. The acronym means Light-Emitting Diodes. TVs that use LED as backlight have a giant light shutter behind the screen. It dims and illuminates the TV’s pixels based on the action taking place on your screen. LED displays produce deeper blacks and a more saturated color. That's because they have a greater optical range and are more power-efficient than fluorescents. In 2005, Sony produced the first LED TVs. In the near future, we should see MicroLED TVs. Their displays consist of microscopic LEDs forming the individual pixels.


Deyan Georgiev

Deyan Georgiev

Deyan has been fascinated by technology his whole life. From the first Tetris game all the way to Falcon Heavy. Working for TechJury is like a dream come true, combining both his passions – writing and technology. In his free time (which is pretty scarce, thanks to his three kids), Deyan enjoys traveling and exploring new places. Always with a few chargers and a couple of gadgets in the backpack. He makes mean dizzying Island Paradise cocktails too.

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