Energy efficient lightbulbs work very differently from the traditional incandescent lightbulb. This allows them to run on much less electricity and much more efficiently.

How does an energy efficient lightbulb work?How does an energy efficient lightbulb work exactly?

LED energy efficient lightbulbs use the movement of electrons in a semi conductor to produce light. This allows them to use less electricity and last up to fifty hours longer than old fashioned incandescent lightbulbs.

Positive and negatively charged particles move around the area inside the diode – the D in LED. Particles drop through holes in the semiconductor when the diode is powered with electricity. When they do, energy is made in the form of a photon. We recognise photons as light. The exact process and material controls what kind and colour of light is made.

How is that different from traditional lightbulbs?

Traditional lightbulbs were invented by Thomas Edison in 1879. Although the materials and exact design has changed since then, the principle remains the same. A metal filament is encased in glass and heated to produce light. The problem with this design is that it produces a lot of heat as a byproduct and much of the electricity used is wasted.

On the other hand, an LED energy efficient lightbulb produces very little heat. An LED that has been switched on for hours is still easy to handle. 

How does an energy efficient lightbulb last so long?

The reason old fashioned bulbs break is because the vulnerable metal filament wears down after all the heating and cooling. Once it breaks the bulb is useless.

Energy efficient LED lightbulbs don’t have that filament and don’t subject the bulb to as much heat. So they last up to fifty times longer! The design of an LED is simpler so there are less components to develop problems and stop the light from working.