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PULSE VTL Light Management System

Biodynamic Light in the Office

PULSE VTL - In the morning
PULSE VTL - In the middel of the day
PULSE VTL - In the afternoon
PULSE VTL - In the evening

Villingen-Schwenningen, March 2014: The new PULSE VTL light management system from Waldmann imitates the dynamic course of daylight, recreating the natural light experience and its positive effects at office work stations.

Developed from Experience

Waldmann already has ten years of experience with biologically effective lighting because this is how long the company has implemented luminaires with the visual timing light (VTL) light management system from its Group brand, Derungs, in the health care sector.

Waldmann realized the first implementation of biodynamic visual timing light for the special needs of offices with the new LAVIGO LED free-standing luminaire, which will be available starting in the spring.

Product Manager Klaus-Jürgen Hahn explained the principle: "We want to support people at work stations with biologically effective light and not manipulate them." To do this, natural stimuli are emitted depending on the time of day, starting with activation in the morning with a higher share of light from the blue spectrum. The PULSE VTL light management system was closely developed together with Dr. Herbert Plischke, Professor for Light and Health at the Ludwig Maximilians Universität in Munich, Germany.

The indirect share of light from LAVIGO imitates the course of daylight according to a defined control curve. The diffuse room light naturally activates people, supporting concentration and productivity. The direct share of light has a natural light color at 4000 Kelvin. The user can switch and dim this share according to their needs. "We achieve the best possible visual comfort at work stations with this combination," said Mr. Hahn.

The Biological Effect of Light

The fact that light biologically affects people is still a relatively new scientific discovery. The visual and emotional effect of light has been known for a long time, but researchers discovered the retinal ganglion cells in the eye in 2002 for the first time, providing evidence for the non-visual effect of light.

The biological effectiveness of light depends on the color temperature or the dynamic, the illuminance, and the area and the direction from which it comes.

Color temperature and illuminance also change dynamically over the course of the day. The share of blue light activates and suppresses the hormone, melatonin. Illuminances between 500 and 1500 lux already have a biological effect. However, light must also enter the eye from a large area from in front and above.

Taking Efficiency and Comfort into Account

Even though biologically effective lighting includes phases with higher illuminances than the standard prescribes, it can be energy efficient at the same time. "To do this, we have introduced the newest, highly efficient LED lamps and our PULSE daylight and presence sensor technology," said Mr. Hahn. "The sensor technology alone reduces energy consumption almost by half."

Waldmann achieves planning security for dynamic and flexible lighting solutions in open-plan offices using the PULSE TALK light management system. This enables free-standing luminaires to communicate with each other in groups via wireless standard. As a result, the indirect, dynamic share of light can be controlled homogeneously, creating a uniform color mood. To still ensure efficient operation, the direct share of light remains off at unoccupied work stations. In principle, the user can influence their free-standing luminaire at any time and can switch the direct and indirect shares of light individually.