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How Do LED Lights Change Colour?

Written by admin. Comments Off on How Do LED Lights Change Colour? Posted in: LED Lighting

Contrary to widespread belief, LED lights aren’t in fact anything close to ‘new’ technology. The reason being that in one form or another, LEDs have been around for more than five decades. It’s just that it’s only as of relatively recently that the technology has begun hitting its stride – both in terms of product availability and affordability.

Back in the day, LEDs were only able to emit a single colour. These days however, colour-changing LED bulbs can deliver no less than an all-encompassing light show, all on their own. The question being – how do LED lights change colour? What is it about today’s technology that allows for the design and development of the colour-changing LED light?

The Basics of LED Colours

Well, in terms of how and why any given LED emits the colour of light it does, it all comes down to the level of energy involved. Semiconductors within the LED essentially transform energy into light, which were in the early days available in very limited types/specifications. Though even today, each specific LED is only capable of emitting light in a single colour.

So once again – how does a colour-changing LED work?

The short answer – it’s actually the result of a little trickery. If being entirely honest about the whole thing, there isn’t really such a product as a colour-changing LED bulb. The reason being that with the LED colour-changing lights you see on the market these days, they are actually made up of three individual LEDs, which are housed within the same case, alongside a microscopic control system to take charge of the colour-changing effect.

Within a colour-changing LED light, the three LEDs are red, green and blue.  Where required, energy can be passed through any one of these LEDs, subsequently emitting red, green or blue light accordingly. However, if two of the LEDs are activated at the same time, the colours are combined to create an entirely new colour in the form of yellow, cyan or magenta. These six colours in total can then be used in combination with one another to produce just about any other colour from across the spectrum. And if energy is passed through the LEDs all at the same time, the result is a colourless white light.

All over the world, colour-changing LED lights are becoming common staples as decorative lighting fixtures in homes, bars, public places and elsewhere. From changing the colour of the light emitted in accordance with requirements to cycling through various colours to create an impressive light show, there are countless applications for these not so humble devices.

What’s more, the associated costs of even the highest quality LED colour-changing lights are coming down all the time. In turn resulting in more colourful devices being positioned in more places than ever before.

It’s just that comparatively few have any idea that the magic happens courtesy of a trio of LEDs, rather than a single colour-changing bulb.

…so consider yourself one of the lucky and informed few!