Peop le need day l ightLuxstat LED wi re less l ight ing contro l

L i v ing w i th na tu ra l l i gh t

Human existence is dependent on the existence of daylight. Our or-ganism is physically sustained and men tally balanced by the eternal switch between light and darkness. Standard electric lighting, it has been proved, is not able to fulfill this vital role, mainly be causear ti ficial light is normally charac-terized by far lower illuminance levels than natural light – as much as 10 to 100 times lower, in fact. However, it is clear that the twotypes of lighting work well together.There are times and days over the year where the available daylight does not suffice our needs, and there are rooms without win dows, where people cannot see the day-light at all. These are the times and places where the ad dition of elec tric light greatly improves our visual performance, and as such the general success level of our activ-ities.It does not, however, compensate for the lack of daylight.

Not getting enough daylight is as bad as getting too much; in severe cases the imbalance may influence our mental state of mind: - Seasonally conditioned emotional disorders – due to a lack of day- light (typical phenomenon identi- fied in northern latitudes in fall).- Reduction of well-being, due to a lack of contact with the exterior.- Fatigue – due to too much lumi- nance (neon tubes have a lumi- nance over 10,000 cd/m2, and people that are exposed to them often complain about the light being glary and unpleasant, even if the light sources are positioned high above their heads).- Delayed reactions = reduced alertness as a result of insuffi- cient light.

Daylight varies in intensity and colour during the day.

Jens Christoffersen, Senior Researcher, Ph.D.Department of Health and Comfort Aalborg University, Danish Building Research Institute, Hoersholm, Denmark.

”The human needs to incorporate vision and the avoidance of visual discomfort, but also demand atten-tion to lighting for the maintenance of good health, task performance, interpersonal communication, and aesthetic apperance. (Stated by Veitch, 2007).

Today, in a world concerned about carbon emission, global warming and sustainable design, daylit buil-dings are proposed as being part of the ”solution”.

Daylighting is acknowledged as pro-viding many benefits ranging from improvements of people´s health and well-being to increased lighting quality.

Successful daylight design requires trade-offs and optimisation be-tween competing elements of fa-cade, space, and lighting system.It also requires reliable tools and/or descriptors for different aspects of comfort and energy demand.

The challenge for the lighting community, in the years to follow, is to incorporate the discovery of new photo-receptors – retinal cells that detect light – into common design, practice and new lighting recommendations. These cells detect only light and darkness, and synchronize circadian cycles of hormone release, bodily functions and activity. But it is still unknown which implications these newly discovered photo-receptors will have for architecture and lighting design.”

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Natu ra l spec t rum o f l i gh t

Windows collect daylight from the sky, the sun, and its reflections from the environment. The spec-trum of light transmitted through the windows is continuous and without the sharp unpleasant peaks that are all too common with fluorescent light. If, at the same time, the climatic conditions are not extremely stable and constant, the light transmitted through the windows varies in both intensity and colour. This is the very daylight characteristic that is so hard to copy - but it is, at the same time, exactly what we intend to do.

Various spectra of light measured in pointing a spectrophotometer toward the sky vault.

Source: ENTPE-CNRS, Lyon, France

Short term variations of correlated Colour Temperatures under various types of days.

Detailed measurements of the fluc-tuation of daylight teach us a lot about the amplitude, variation and speed of variation of the variation parameters. Such measurements are regularly performed at ENTPE-CNRS laboratory located in Lyon, France. Daylight availability is fully monitored on a sophisticated Day-light Measuring Station (IDMP), and knowledge about daylight is complemented with specific field measurements or processing on satellite observations.

Mr. Marc Fontoynont – Professor and Director of the Building Sciences Laboratory at ENTPE, Lyon, France.

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Kenneth Munck, Director, The Danish Illuminating Engineering Society: ”I see LEDs in general lighting as one of the most promising techno-logies at the moment in terms of energy efficiency. Although there are multiple advantages attached to LED, LED lighting is not suit able for all applications.”

Just as LED marked a breakthrough in lighthing research, so does SERVODAN’s ability to wirelesslycontrol LED mark an immense breakthrough in the use of LED. LED is a small and insignificantly look ing light source. It is, however, both sturdy and hard working and extremely energy efficient. It has by far a longer work ing life than any other light source on the market. LED is available in white or coloured and in many colour temperatures and can be used for a great many purposes and in a wide varietyof ways. Among other things, LED has made it possible to incorporatelighting as an integral part of architectural structures. To make it an active in its own right.

New d imens ion o f l i gh t - The LED Technology

CIE Cromatic DiagramAll possible colour coordinates (x,y) are inside the horseshoe curve.

•Longlifetime•Immediatelyfullpower•Maximumdimwithoutchange of colour •Noinfraredorultraviolet radiation•Moreeffectivethanhalogen bulbs and incandescent bulbs•Mercury-freeasopposedto fluorescent tubes •Energy-saving

Kenneth Munck is the managing director of the Danish Illuminating Engineering Society that has 700 members and counts a number of research and development projects in LED and other types of lighting control. Kenneth Munck has held lectures in LED lighting since 2003.

Sustainability throug new technology.

Fee l the l i gh t - Br inging day l ight into the room

To characterize the spectrum of daylight, the CIE (Commission Internationale de l’Eclairage) has defined three standards with three specific Correlated Colour Tempe-ratures: 7500K for a northern sky daylight, 6500K for an average daylight, and 5500K for an equal energy daylight.

Daylight is a prerequisite of human life.

Daylight suppresses the production of the sleep hormone melatonin and daylight supports the waking state hormone kortisol. Together with melatonin, it helps regulate the day-and-night rhythm.

Nature itself provides us with the colours of light.

The perfect light neither glares nor flickers, as glare and flickering tend to create stress and fatigue.

LED-produced daylight does not add to the room temperature.

Contact with daylight and the out-doors lowers the stress level and increases productivity.

The So lu t i on - Luxstat LED wi re less l ight ing Contro l

Luxstat Control

6 Movement Sensor

Light Sensor 8

2 3 Push-buttons

LED LuminaireControl

4 5

LED luminaires and 1-10 V ballasts can now be daylight-controlled in both small and large rooms. The Luxstat LED wireless system is easy to install, and the simple do-it-yourself configurations for sensors and luminaires save both time and money. The solution is pre-programmed with optimal settings for small and large offices, classrooms, and pro-duction areas. In case of changes of room divisions,reprogramming is quite easy. Simply move sensors and push-buttons to the new positions. It is wireless, and therefore possible. To optimize energy efficiency, the rooms can be divided into zones.

Three zones for the ceiling and one for the 3D window. This ensures an even distribution of light from the window and through the entire room. Larger rooms can be divided up to5 areas with movement sensors.This ensures that each of the 1-5areas can be controlled individually,and there will only be light ifnecessary. The other areas can bedimmed to ex. 30%. A light sensor controls the inten-sity, and the programmed scenaries create the dynamic daylight. The Luxstat LED wireless system provides maximum comfort and energy efficiency.

Desk Control

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The dynamic daylight windowTogether with our partner Windauga®, we have developed a lighting solution that adds a feeling of daylight to win-dowless rooms.

The sense of reality is achieved through a patented process that combines specific 3D images with fil-ter boosting 3D effects, real window frames, flat multi-channel light sour-ces, and specific lighting scenarios and effects. A system such as that can be powered by SERVODAN’s Luxstat LED wireless controller so as to give the best possible effects.

The Luxstat LED wireless lighting control system can also control 1-10 V luminaires.

Such systems would come to good use in offices, schools, and public buildings in general.

Centre for Software InnovationThe IT-knowledge centre that has specialized in implementing techno-logy in intelligent products, coun-selling, sharing of knowledge, and matchmaking.

ENTPE-CNRS is a laboratory located in Lyon, France, special-ized in building sciences. Its “Light and Vision” Research Group has quite a long and deep experience of daylight assessment and modelisation, and develops innovating solutions, both in daylighting and electric lighting

systems. For the last 5 years, ENTPE-CNRS has been investi-gating the possibilities of mixing colours of light to improve the perceived lighting quality. All proposed solutions are tested in test rooms, in virtual reality or on site.

Luxs ta t LED w i re l e s s l i gh t ing Cont ro l - The e lements

Luxstat LED Wireless Control79-050 24 V DCA wireless daylight-based LED controller, to control the light in the room.

Luxstat Cut-off Control 1-10 V79-210 230 V ACA controller, to control the 1-10 V luminai-res. Receiving wireless signal from the Lux-stat LED Controller.

Luxstat LED Power Supply - Controller 79-980 24 V DCPower supply for the Luxstat LED Controller.(24 V DC/30 W)

Luxstat LED Power Supply - Luminaire 79-981 24 V DCPower supply for the LED-luminaires.(24 V DC/60 W)

Luxstat LED Desk Control79-200 230 V ACThe desk controller wirelessly switches the light off if nobody is in the room. Also for other applicantions.

Sensor PIR 360° wireless41-380 230 V AC/24 V DCSensor is transmitting the occupancysignal wireless to the Luxstat LED Controller.

Sensor PIR/UL 360°43-225 24 V DCSensor is sending the occupancysignal to the Luxstat LED Controller.

Push-button 4 ch. wireless76-925 Push-button to be placed at the door or blackboard for light manual on/off or dimm.

Push-button 2 ch. wireless76-926 Push-button to be placed at the door or blackboard for light manual on or off.

Luxstat LED USB stick wireless79-930 The USB stick will establish communication to the Luxstat LED Controller for adjustment of parameters.

Luxstat LED Luminaire Controller79-150 Luminaire Control 24 V DC 79-160 Luminaire Control Window 24 V DC79-161 Luminaire Control Window ext. 24 V DCControl for luminaires. Wireless communi-cation.

Luxstat LED Wireless Remote 79-920The remote control allows for manual wire-less communication with the Luxstat LED Controller. Switch on/off, dimm intensity and scenaries.

Light sensor43-197 24 V DCLight sensor measures the daylight in the room and sends a signal to the Luxstat LED Wireless Controller to control the intensity of the light.

Luxstat LED CD79-990 CD with basic software for the Luxstat LEDsystem.

LED Daylight Luminaire (60x60 cm)25-000 Daylight luminaire - ceiling 24 V DC

LED Luminaire – Pure White (60x60 cm)25-200 LED luminaire - ceiling 24 V DC

LED Daylight Luminaire (ceiling) 25-800 - 60x60 cm with frame, 3D-effect, ”blue sky” image and Luminaire Controller.

Daylight window25-500 - 4 pcs. each 60x60 cm with frame, 3D-image (separately specified) and Lumin-aire Controller.

25-600 - 2 pcs. each 60x60 cm with frame, 3D-image (separately specified) and Lumin-aire Controller.

25-700 - 1 pcs. each 60x60 cm with frame, 3D-image (separately specified) and Lumin-aire Controller.

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