People need daylight Luxstat LED wireless lighting control
Living with natural light Human existence is dependent on the existence of daylight. Our organism is physically sustained and mentally 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 because artificial light is normally characterized by far lower illuminance levels than natural light – as much as 10 to 100 times lower, in fact.
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- 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.
However, it is clear that the two types of lighting work well together. There are times and days over the 1 0,9 year where the available daylight 0,8 does not suffice our needs, and 0,7 there are rooms without windows, 0,6 where0,5people cannot see the day0,4 light at0,3 all. These are the times 0,2 and places where the addition of electric0,1 light greatly improves our 0 visual performance, 0 0 0 0 0 0 0 0 0 0and 0 0 0 as 0 0 0 0 the 0 0 such 0 0 0 0 0 0 0 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 general success level of our activities. It does not, however, compensate for the lack of daylight.
Daylight varies in intensity and 1 colour during the day. 0,9
Not getting enough daylight is as bad as getting too much; in severe cases the imbalance may influence our mental state of mind:
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”The human needs to incorporate vision and the avoidance of visual discomfort, but also demand attention 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 buildings are proposed as being part of the ”solution”.
Daylighting is acknowledged as providing many benefits ranging from improvements of people´s health and well-being to increased lighting quality. Successful daylight design requires trade-offs and optimisation between competing elements of facade, space, and lighting system. It also requires reliable tools and/or descriptors for different aspects of comfort and energy demand.
Jens Christoffersen, Senior Researcher, Ph.D. Department of Health and Comfort Aalborg University, Danish Building Research Institute, Hoersholm, Denmark.
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.”
Natural spectrum of light
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Various spectra of light measured in pointing a spectrophotometer toward the sky vault.
Short term variations of correlated Colour Temperatures under various types of days.
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Windows collect daylight from the sky, the sun, and its reflections from the environment. The spectrum 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.
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Source: ENTPE-CNRS, Lyon, France
Mr. Marc Fontoynont – Professor and Director of the Building Sciences Laboratory at ENTPE, Lyon, France.
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Detailed measurements of the fluctuation of daylight teach us a lot about the amplitude, variation and speed of variation of the variation parameters. Such measurements are regularly performed at ENTPECNRS laboratory located in Lyon, France. Daylight availability is fully monitored on a sophisticated Daylight Measuring Station (IDMP), and knowledge about daylight is complemented with specific field measurements or processing on satellite observations.
New dimension of light - The LED Technology Just as LED marked a breakthrough in lighthing research, so does SERVODAN’s ability to wirelessly control LED mark an immense breakthrough in the use of LED. LED is a small and insignificantly looking light source. It is, however, both sturdy and hard working and extremely energy efficient. It has by far a longer working 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 variety of ways. Among other things, LED has made it possible to incorporate lighting as an integral part of architectural structures. To make it an active in its own right.
• Long lifetime • Immediately full power • Maximum dim without change of colour • No infrared or ultraviolet radiation • More effective than halogen bulbs and incandescent bulbs • Mercury-free as opposed to fluorescent tubes • Energy-saving
Sustainability throug new technology.
Kenneth Munck, Director, The Danish Illuminating Engineering Society: ”I see LEDs in general lighting as one of the most promising technologies at the moment in terms of energy efficiency. Although there are multiple advantages attached to LED, LED lighting is not suitable for all applications.” 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.
CIE Cromatic Diagram All possible colour coordinates (x,y) are inside the horseshoe curve.
Feel the light - B r ing i n g d a y l i g h t i n to t h e room 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.
To characterize the spectrum of daylight, the CIE (Commission Internationale de l’Eclairage) has defined three standards with three specific Correlated Colour Temperatures: 7500K for a northern sky daylight, 6500K for an average daylight, and 5500K for an equal energy daylight.
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 outdoors lowers the stress level and increases productivity.
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The Solution - Luxstat LED wireless lighting Control 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 production 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 to 5 areas with movement sensors. This ensures that each of the 1-5 areas can be controlled individually, and there will only be light if necessary. The other areas can be dimmed to ex. 30%. A light sensor controls the intensity, and the programmed scenaries create the dynamic daylight. The Luxstat LED wireless system provides maximum comfort and energy efficiency.
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The dynamic daylight window Together with our partner Windauga®, we have developed a lighting solution that adds a feeling of daylight to windowless rooms. The sense of reality is achieved through a patented process that combines specific 3D images with filter boosting 3D effects, real window frames, flat multi-channel light sources, 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.
ENTPE-CNRS is a laboratory located in Lyon, France, specialized 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
Centre for Software Innovation The IT-knowledge centre that has specialized in implementing technology in intelligent products, counselling, sharing of knowledge, and matchmaking.
systems. For the last 5 years, ENTPE-CNRS has been investigating 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.
Luxstat LED wireless lighting Control - The elements
Luxstat Cut-off Control 1-10 V 79-210 230 V AC A controller, to control the 1-10 V luminaires. Receiving wireless signal from the Luxstat LED Controller. Luxstat LED Power Supply - Controller 79-980 24 V DC Power supply for the Luxstat LED Controller. (24 V DC/30 W) Luxstat LED Power Supply - Luminaire 79-981 24 V DC Power supply for the LED-luminaires. (24 V DC/60 W) Luxstat LED Desk Control 79-200 230 V AC The desk controller wirelessly switches the light off if nobody is in the room. Also for other applicantions. Sensor PIR 360° wireless 41-380 230 V AC/24 V DC Sensor is transmitting the occupancy signal wireless to the Luxstat LED Controller. Sensor PIR/UL 360° 43-225 24 V DC Sensor is sending the occupancy signal to the Luxstat LED Controller. Push-button 4 ch. wireless 76-925 Push-button to be placed at the door or blackboard for light manual on/off or dimm. Push-button 2 ch. wireless 76-926 Push-button to be placed at the door or blackboard for light manual on or off. Luxstat LED USB stick wireless 79-930 The USB stick will establish communication to the Luxstat LED Controller for adjustment of parameters.
Luxstat LED Luminaire Controller 79-150 Luminaire Control 24 V DC 79-160 Luminaire Control Window 24 V DC 79-161 Luminaire Control Window ext. 24 V DC Control for luminaires. Wireless communication. Luxstat LED Wireless Remote 79-920 The remote control allows for manual wireless communication with the Luxstat LED Controller. Switch on/off, dimm intensity and scenaries. Light sensor 43-197 24 V DC Light 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 CD 79-990 CD with basic software for the Luxstat LED system. 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 window 25-500 - 4 pcs. each 60x60 cm with frame, 3D-image (separately specified) and Luminaire Controller. 25-600 - 2 pcs. each 60x60 cm with frame, 3D-image (separately specified) and Luminaire Controller. 25-700 - 1 pcs. each 60x60 cm with frame, 3D-image (separately specified) and Lumin aire Controller.
Stenager 5 DK-6400 Sønderborg Tel: +45 7442 4726 Fax: +45 7442 4035 info@servodan.dk www.servodan.com
090401CWH-R1
Luxstat LED Wireless Control 79-050 24 V DC A wireless daylight-based LED controller, to control the light in the room.