Energy revolution, save energy, secure advantages…

The topic of light and lighting is mostly only considered from the aspect of saving energy and rapid amortization.

Just to anticipate it right away:

Saving energy is not our topic here - we have been doing that for quite a while and it has become the standard.

We are now talking about the light as a qualitative aura that often accompanies us many hours each day.

We have long been used to our living space being flooded by artificial light. It has made us more free and independent.

But what do we know about the quality and effects of light?

Light brightens our world and sets moods

The invention of the lightbulb and its refinement by Thomas Alva Edison set the basis for the electric lighting of streets, houses and also homes.

The world exhibition in Paris in 1878 was one of the first great events that was carried out with the help of carbon arc lamps.

Edison improved the concept in 1879 by using a high-impedance carbon filament, creating the first lightbulb suitable for mass use. He already employed the typical glass bulb that needs to be almost void of air (vacuum) for the filament not to burn. The extraction of air/oxygen is vital to the lightbulb and the modern halogen lamp.

Halogen and xenon lamps use halogen or the inert gas xenon instead of a vacuum to displace the oxygen.

Although the fluorescent lamp was invented earlier, it only became suitable for mass use in 1938 due to patents to line the tube with fluorescent substances and an increase in gas pressure.

Fluorescent lamps are filled with gas: Mercury vapor and argon are induced to glow directly by applying electricity, which makes them create large amounts of invisible, yet highly energetic ultraviolet light.

This ultraviolet light creates visible light when it hits the glass tube lined with fluorescent substances.

There is no necessity for a filament and the operating temperature is a lot lower (less heat generation).

This makes fluorescent lamps a lot more efficient, yet they have a huge disadvantage: They contain poisonous mercury.

Disposing of a fluorescent lamp is no trivial task and breaking such a lamp can pose serious health risks.

The light of the 21st century…

It has been long awaited and necessitated fundamental inventions - the LED.

The light emitting diode is a so-called semiconductor, whose electrical properties are akin to those of a diode. A diode is a sort of one way road for electricity.

When electricity flows through the diode in the outlet direction it emits light in a color (wavelength) specified by the semiconductor material and the so-called energy band gap.

For roughly three decades after its invention in 1962 it was merely used for displays and to transmit signals. The little red lights many hifi systems and other electric devices use to show that they are running were usually monochrome, red LEDs.

It took up to the end of the 1990s until LEDs started being used as light sources for every day applications.

Only in the year 2014, three scientists were awarded the Nobel Prize for physics for the invention of the "blue LED”.

Just this invention enabled the creation of highly efficient and bright LEDs with a balanced color spectrum.

The invention of the blue LED was a milestone - not just for blue light…

Full spectrum and CRI… what do they mean?

Visible, white light, like sunlight, contains all colors.

The colors contained in the visible spectrum of sunlight can be made visible by using a prism - a triangle of glass.

This creates a light-band with a continuous gradient moving from dark red to red-orange, yellow, green, blue, dark blue to dark violet.

This is what we refer to as the spectrum of visible light.

The sun is the benchmark in all things light

The quality of sunlight containing all the colors is vital to our color perception.

The sun provides all there is - sunlight is perfectly suited to render all shades and nuances of color.

This is why the color rendering index (CRI) was introduced.

For sunlight this is: CRI 100

Normal halogen lamps and LEDs are usually in the range of 75 - 85 CRI.


The CRI value is defined for so-called test-colors. 14 such colors - called R1, R2 … R14 - have been determined internationally.

Typically, LEDs are especially dim at R9 (red), where they have a very low CRI rating.

A so-called full spectrum LED, such as the Soraa Vivid, on the other hand, reaches a CRI of well over 90 for all test-colors.

The so-called color temperature also plays an important role along with the ability to render all color nuances correctly and without any gaps.

Although lightbulbs can create a continuous color spectrum, they usually have a certain yellowness or redness.

Their color temperature is too low and usually is in the range of 2000 - 4000 Kelvin.

Fluorescent lights on the other hand can create so-called white daylight at a color temperature of 5000 - 6000 Kelvin, but they are unable of rendering a continuous color-spectrum.

Looking at their light through a prism, one will find large gaps in the spectrum; some colors are underrepresented or missing entirely.

Everyone has experienced this: The yellow light of streetlights swallows up almost all the colors of the usually colorful scenery.

Both the color rendering index and the color temperature are crucial to our perception of colors, contrast and all the shades of white.

Back to the topic page:
Let there be light…

Why you should pay attention to good light…

"Bad light will ruin your eyes” used to be a common warning grandparents gave their grandchildren.

Yet bad light does not ruin our eyes but our soul

Really, we do know it, yet we do not act accordingly…

  • We know: During winter and fall, when the sun is hardly seen and the skies are grey we feel a certain gravity hit our souls.
  • We know: When the fluorescent lamp sparks to life in the bathroom each morning… we would rather not recognize ourselves in the mirror.
  • We know: We look around for a window or daylight in vain, when shopping for clothes, to judge a new piece’s true colors…


The list of experiences goes on and on - and yet true quality light is still unknown territory for many.

Artificial light with the quality of sunlight is changing our world - how we perceive it.

Everything seems more real, vivid, lively and positive when illuminated by quality light - by the sun.

High quality light lets us discover new nuances and offers us a positive attitude towards life.

Back to the topic page:

Let there be light…

A Nobel Prize in physics for the world’s best LED…

Research in this area has revealed solutions for a special kind of LEDs:

White light with the quality and properties of the full spectrum - as it is provided by the sun

Professor Shuji Nakamura is one of the founders of Soraa Inc. and was awarded a Nobel Prize for his research on the blue LED. The LEDs of the VIVID range by Soraa are full spectrum LEDs that leave conventional lightbulbs and halogen lamps far behind.

See the facts on

The full spectrum LEDs are not just especially efficient - making them cheap to run - they also create incomparably high-grade light that renders colors, nuances and contrasts brilliantly and can display almost endless shades of white light.

The luminosity of white is mainly achieved by blue and ultra-blue components of light.

And this is where we come full circle:

The invention of the blue LED achieved a breakthrough in conjunction with the unique GaN on GaN (gallium nitride on gallium nitride) technology by Soraa.

Yet our perception of light and color is not limited to quality, contrast and the range of nuances.

All of these have an immediate, but long-lasting bearing on our psyche.

A sunny scenery simply has a different emotional effect on us than a grey scene and overcast skies.

Soraa Vivid LEDs always let the sun shine.

Soraa Vivid LEDs are free of mercury.

Back to the topic page:
Let there be light…

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