LED Technology

Let’s take a basic look at what makes the LED so different from anything that’s come before.

Since the dawn of the human journey until about seventy years ago, all artificial light came from fire. Whether that light came from a length of string encased in a cylinder of wax or fat, or from a dried fish on a spike (don’t you just love those crazy Norwegians), it always involved something being set on fire. Even Edison and Swann’ epoch-making work was really just setting fire to a metal filament encased in a glass bubble.

It all got a bit more exciting once the scientists were able to capture lightning in the laboratory – in what became the fluorescent tube, to you and me.

And so to electronics and something so extraordinary that it defies nature! We didn’t need electricity to make fire, nor to make lightning, but we certainly needed electricity before we could invent the LED, so respect to Michael Faraday, that great man, for all his Works.

For the sake of the non-scientists reading this (and that includes your writer) all we need to say is that the light from an Led involves a sparkling cast of anodes, cathodes, holes and electrons –all appearing at The P-N Junction. A great club. Everything else is detail.

Here at Contrac Lighting we use only the best Xicato LED sources for our Quartet light fittings. They give the best performance across the widest spectrum of tests and measures; from reliabilty, colour rendering, control, light output and overall performance. If you want to know more about the benchmarking of LEDs we've written a short guide that describes some of the issues (and pitfalls) in comparing some of the LEDs available today.