What is meaning of LED ?

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What is the meaning of LED bulb?

LED bulb - Computer Definition. A light source that is created by a light emitting diode (LED). For decades,

LEDs have been used as indicator lights on myriad products; however, starting in the 2000s, they began to replace incandescent, halogen and fluorescent bulbs.

LED bulb - Computer Definition
A light source that is created by a light emitting diode (LED). For decades, LEDs have been used as indicator lights on myriad products; however, starting in the 2000s, they began to replace incandescent, halogen and fluorescent bulbs. LEDs draw considerably less power and are up to 80% more efficient.

Although claims are made for some bulbs lasting 25 years, one should expect a long lifespan under normal usage.

In Their Infancy As of 2016, LED bulbs are still more expensive than incandescent bulbs; however, prices are constantly decreasing.

Companies continue to experiment with numerous designs. For example, when red, green and blue LEDs are combined, they produce white light.

Another method uses a blue LED and yellow or red phosphors. New Lights - A Different Power Source As incandescent bulbs are replaced with LED bulbs using the same Edison screw mount, the LED bulb must include AC to DC conversion.

However, if the bulb's power source is DC such as from powered Ethernet, they are more efficient (see PoE and Edison base).

See incandescent bulb, halogen bulb, fluorescent bulb, Acandescent bulb, OLED lighting and LED.

Incandescent Vs. LED


The LED bulb on the right draws 3.5 watts but delivers the same brightness as the 45-watt bulb on the left.

This LED bulb casts a very white light; however, LED bulbs run the gamut from warm yellow to white-blue (see color temperature).

They Sure Are Weird Looking

This Philips LED bulb hardly resembles incandescent lighting, which has been used for more than a century.

LED Night Light - 23 Times Less Power

Instead of the 7 watt incandescent bulb in the typical night light, this LED uses 0.3 watts. The blue arrow points to the single LED; the red arrow shows the light sensor.

Early LEDs produced only red light, but modern LEDs can produce several different colors, including red, green, and blue (RGB) light. Recent advances in LED technology have made it possible for LEDs to produce white light as well.

The energy efficient nature of LEDs allows them to produce brighter light than other types of bulbs while using less energy.

For this reason, traditional flat screen LCD displays have started to be replaced by LED displays, which use LEDs for the backlight. LED TVs and computer monitors are typically brighter and thinner than their LCD counterparts.

LEDs are commonly used for indicator lights (such as power on/off lights) on electronic devices.

They also have several other applications, including electronic signs, clock displays, and flashlights.

Since LEDs are energy efficient and have a long lifespan (often more than 100,000 hours), they have begun to replace traditional light bulbs in several areas.

Some examples include street lights, the red lights on cars, and various types of decorative lighting.

You can typically identify LEDs by a series of small lights that make up a larger display.

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