Types of LEDsĪn LED is capable of generating light because of the arrangement of the two semiconductor materials located between its electrodes: Two-lead means that there are two semiconductor materials. We’ll explain how this works in the next section. In this case, that piece of solid matter is a two-lead semiconductor Semiconductor A semiconductor is a material capable of conducting an electric current. A light emitting diode is a type of solid-state lighting (SSL) technology, meaning that it emits light from a piece of solid matter. The first two parts of this name are easy to understand – “light emitting” means that it gives off light – but what exactly is a “diode”, and what does it do? To answer that question, we have to get a bit scientific.Īll diodes emit photons (particles of electromagnetic energy), but only certain types of diodes emit that electromagnetic energy as light instead of heat. Understanding what LEDs are and how they work can ease the process of finding the right bulb and switching to energy efficient lighting. But for those who are unfamiliar with modern lighting options like LEDs, making the switch to a new style of light bulb can seem like a daunting prospect. Their high energy usage is just one reason why many governments have begun phasing out traditional light bulbs in favour of energy efficient alternatives like CFLs and LEDs. Here’s a bit of background: incandescent bulbs produce light by heating a filament till it glows – in fact, up to 90% of the energy used to light an incandescent bulb goes towards producing this heat! While most of us are familiar with the warm glow of traditional incandescent bulbs, many may not be aware of how this type of bulb actually works.
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