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Kelvin Adjustable

Light works for you

Humans have always oriented themselves towards the sun and had to adapt their life to the changes in daylight and the seasons. With today’s life- and working style we spend around 90% of our time inside and less than 10% outside. That means that most of the time we are exposed to artificial light and experience very little of the vitalizing, natural light.

Natural light is dynamic – and so are our needs through the day

Our circadian rhythm is naturally responding to the changes of light around us. Our internal clock is partly regulated by the two hormones: Melatonin, which makes you tired/drowsy and cortisol, which makes you feel awake/alert. When we expose ourselves to a higher color temperature and lighting level the melatonin levels are suppressed, and we will feel more alert and awake. But as humans we cannot thrive in the highest color temperature during an entire working day – we need variation and rest to work our full potential.

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The human workplace

The ability to focus on the task at hand and foster great ideas takes more than good office coffee. The human body is not fit for slouching in a chair for eight hours straight, and therefore companies invest in acoustics and ergonomic furniture to optimize the working conditions.

Considering the huge impact light has on our wellbeing and performance it is relevant also to prioritize office, healthcare, and educational lighting. Maybe even view dynamic lighting as an asset that can help companies with creating a both more healthy and effective working environment. And also light with various intensity is more energy efficient.

What is Kelvin Adjustable?

Louis Poulsen fixtures with Kelvin Adjustable have a color temperature spectrum of 2700-5700K, which allows the light to vary precisely between these two, to simulate the color temperatures of natural daylight from morning to evening. The fixture can also vary the intensity of light simulating the varying intensity of daylight throughout the day.

Simulating nature’s rhythm

With simple pre-programmed sequences, the light dynamically changes throughout the day either simulating the light outside our windows or adding increased dynamics and light levels to support the variable levels of work activity.

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Early morning
  • Daylight: Warm color temperature starts at 2700K and moves slowly up, for people to gently start their day.
  • Energizer: Intensity is set at only 50% to add a comfortable experience of space, so an individual desk light serves as a good supplement.
Morning
  • Daylight: Colour temperature moves slowly up towards 4000K
  • Energizer: Intensity rises quickly and colour temperature rises to an early peak of 4000K at 10:00.
Morning/Lunch
  • Daylight: Intensity drops again and color temperature drops to 3500K.
  • Energizer: Intensity begins to rise and color temperature stays at around 4000K.
Early afternoon
  • Daylight: Intensity rises to a peak around 14:00 to suppress the ”post-lunch” energy dip. Color temperature rises to a peak at 5700K.
  • Energizer: Intensity continues to rise to a peak around 15:30.
Evening
  • Daylight and Energizer: Following the peak, the intensity drops again towards a 50% output. Color temperature drops to 2700K.

Intelligent lighting in three dimensions

More than 1.200 Circle fixtures of different sizes and mounted in different levels light up the headquarters of Dansk Metal (The Danish Union of Metalworkers). Each programmed to send out one of three different types of light:

  • Simulate daylight throughout the day.
  • High color temperature and intensity fit for concentration.
  • Low light temperature fit for recreation and socializing.

The result is natural lighting that follows the dynamics of the daylight, changes with the season and not least separate the domicile into zones of different purposes.

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The sky and the fire

Besides the sunlight, the fire was an important light source for the early humans. This can inspire us in the way we furnish offices with lighting. We can have dynamic light mimicking the sun and an individual light at each workstation, where employees can adjust each their individual lights just the way they want them.

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