Why LED?

To understand fully the impact that LEDs have made on the world, it becomes imperative to understand what it is, how it’s affecting the markets and consumers and biggest of them all Why?

What is an LED?

LEDs or Light Emitting Diodes are electronic devices that are engineered using semiconductor materials which convert electricity into light.

LEDs are formed by the flow of electrons through a junction formed by fusing two slightly varied materials. When these flowing electrons encounter entities called holes at the junction, they combine to release energy in the form of Light that is emitted by the LED.

LED lighting is the future of sustainable development and we at Imperial LED want to be the bridge that takes you to it.

Colour based Classification of LEDs:

LEDs take different colours depending on the semiconductor element used.

The two main type of LEDs presently used for lighting systems are Aluminium Gallium Indium Phosphide(AlGaInP) alloys for red, orange and yellow Lighting; and Indium Gallium Nitride(InGaN) alloys for green, blue and white lighting.

The white light so often used in most lighting applications is created using either of the two approaches:

Mixed-colour white light:

One approach is to mix the light from several coloured LEDs (as shown below in the schematic diagram) to create a spectral power distribution that appears white.

Phosphor-converted white light:

Another approach is generating white light by use of phosphors (a synthetic fluorescent or phosphorescent substance) together with a short-wavelength LED.