How Do LED Lights Work?

How Do LED Lights Work?

LED light bulbs are becoming an increasing popular lighting choice for homeowners throughout the country. Light-emitting diodes (LEDs) are known for their durability and hard-wearing qualities, as well as their long life span. This makes them a clever choice when designing your home lighting options, as they require changing less often and can reduce power bill costs.

However, what sets them apart from traditional lighting sources and how do these bulbs actually function?

The diode in the title refers to an electrical component, which has two terminals but electricity is only conducted in a singular direction. Although usually small in size, an LED light bulb can be capable of emitting bright light.

What we see as light is actually photons, which are the miniscule particles that form light as we know it. In an LED bulb, these photons are made by exciting the electrons – producing a range of light colours and quality with less electricity than found in traditional incandescent bulbs.

A type of semiconductor known as p-n junctions are used to make LEDs. The elements that form this component of the bulb can be altered to affect the types of materials produced, and the boundary between two types is called a p-n junction.

The space between the top and bottom electrode is where the junction is located, and phosphers are the part of the bulb that filter and push the light outwards. These are used to create brighter, harsher lighting choices, such as you’d see when using LED bulbs in spotlights in the kitchen, bathroom or area of the home that requires strong, directional lighting.

The light cone – or space that the light can reflect off the semiconductor – is very narrow, so light produced from these type of bulbs tends to look best when viewed from one angle.

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