Interesting article about lighting controls and the Internet of Things in this article by ARCHITECTURAL LIGHTING.
Daintree Networks® has introduced its WHS100 Wireless Sensor, which provides integrated wireless connectivity and an embedded motion control sensor in one package and operates with the Daintree ControlScope® wireless building control solution.
Daintree Networks’ WHS100 Wireless Sensor is a versatile solution for a wide range of fixture types, including high-bay, mid-bay and low-bay luminaires for industrial and warehouse facilities. With a wide operating temperature range and wet location rating, the WHS100 is well-suited for manufacturing environments, as well as parking and outdoor area lighting applications. Integration of sensing with wireless connectivity provides a one-box solution that reduces the cost, while the design of the sensor allows for easy installation into the fixture and optimal wireless RF performance.
Using open standards ZigBee PRO wireless communications, the WHS100 operates seamlessly with other standard ZigBee PRO wireless products in the Daintree ControlScope ecosystem to provide advanced lighting control, such as smart scheduling, daylight harvesting, task tuning and more, in addition to occupancy-based control. With built-in metering, the WHS100 can monitor and measure the energy consumption of the lighting load being controlled, and also enable automatic fault detection.
Universal Lighting Technologies has added to its family of EVERLINE products with the new EVERLINE Surge Protectors, capable of managing a surge of up to 20kV. Inserted between line voltage and the driver/module or ballast/lamp system, EVERLINE Surge Protectors provide system-wide protection, eliminating the need for internal fixture components that are rated to handle large spikes in input voltage.
Click here to learn more.
LED lighting has made a new dimension of lighting control, color tuning, widely available. By mixing separately dimmable arrays of warm- and cool-white, saturated colors (RGB+A) or a mix of the two, correlated color temperature (CCT) can be tuned manually or automatically based on various application needs.
Besides CCT, the source’s color rendering index (CRI) can be raised or lowered within a given range. The maximum depends on the source, while the minimum depends on the designated CCT. This is accomplished by gradually reducing the red component of a red, blue, green and either yellow or amber mix.
While the primary benefit of modulating CCT is aesthetics, the primary benefit of modulating CRI is energy savings. As CRI declines, luminous efficacy increases. This creates a potential energy savings opportunity in spaces that must remain illuminated at full output and constant CCT while unoccupied.
David L. Bay, LC, corporate engineer for OSRAM SYLVANIA, sees airport concourses as a potential application for this novel control strategy. The lights must remain ON and at full output at night for safety, though for much of the night large parts of the concourse may be unoccupied. CCT must be maintained because changing CCT would be objectionable from an aesthetic point of view.
In this application, the lighting in the main circulation spaces would be zoned to operate at full output and specified CCT and CRI. Lighting in peripheral areas would be separately zoned, with CRI reduced based on occupancy or a schedule.
“CRI modulation would be suitable for applications with certain characteristics,” Bay says. “Notably, applications where maintaining high lux levels for safety or other reasons is important, and where the space is granularly occupied at different times of the day.”
Actual energy savings would depend on the application, though Bay believes at least 10% would be typical, and up to 25+% has been demonstrated. Another question is whether occupants would find a change in CRI objectionable.
In 2005, the Massachusetts Institute of Technology (MIT) conducted a study in an open office and two private office spaces at the institute’s Media Lab. The researchers wanted to know how far CRI could be reduced before occupants noticed the change and/or found it objectionable.
Eight OSRAM SYLVANIA LED panels were installed in the ceiling of the open office and two each in the private offices. These LED panels were color tunable and of an experimental design. CCT was maintained at 5000K, light levels at about 30 footcandles. The study participants—13 graduate students with no prior knowledge of the study—were asked to perform tasks in the spaces. While they were working, CRI was adjusted over a period of three seconds from 89 to 68. Shortly afterwards, a pop-up questionnaire appeared on their screen asking what activity they were doing and whether they noticed the change.
Three hundred twenty of these queries received responses; of these, 203 responses (63%) indicated a change had not been noticed. Changes were more likely to be noticed when occurring in the immediate area or simultaneously in the immediate and peripheral areas. Changes were least likely to be noticed when they occurred solely in a peripheral area.
“Experience suggests CRI modulation within an occupied space will not be well accepted,” Bay notes. “The concept of CRI dimming is currently founded on modulating CRI of unoccupied spaces adjacent to occupied spaces.”
CRI modulation was considered a good potential if not practical strategy at the time of the study. LED technology has made significant advances since then, making it practical. Still, Bay notes, the requirements of color-mixing LEDs and granular zoning poses a cost that challenges economic viability. As LED technology continues to progress, however, CRI modulation may become viable from an economic as well as a technological standpoint.
Bay sees CRI modulation being paired with another potential control strategy, which is using LED general lighting as an indicator. For example, peripheral lighting in a private office could automatically adjust to become red when the occupant is on the phone, both saving energy while indicating the occupant should not be disturbed. This potential has many applications.
“Color tuning has opened a vast potential in lighting design and application, and we are just beginning to pioneer,” Bay says. “While these applications focus on aesthetics with some interest in circadian health, this extraordinary emerging dimension of lighting control may also be used to maximize energy savings.”
To learn about the MIT study and its results, click here.
The Lighting Control Innovation Award was created in 2011 as part of the Illuminating Engineering Society’s Illumination Awards program, which recognizes professionalism, ingenuity and originality in lighting design. LCA is proud to sponsor the Lighting Control Innovation Award, which recognizes projects that exemplify the effective application of lighting controls in nonresidential spaces.
This month, we will explore the role that an innovative lighting control solution plays at the Cleveland Clinic’s Fairview Hospital Intensive Care Unit. Lighting and control design by Shawn Callahan, Lighting Designer, Karpinski Engineering. Photography by Lisa Wilding, Karpinski Engineering. Lighting and controls by Cooper Lighting and Lutron Electronics.
Holistic patient care was the design criteria at Cleveland Clinic Fairview ICU. Through automatic lighting controls and patient centered design considerations, patient satisfaction, employee efficiency and energy savings were improved.
One aspect of the holistic design was to select luminaires that accentuated the linear and nonintrusive architectural details of the space while providing non-obtrusive illumination to corridors, work areas and patient rooms. Another aspect was the innovative lighting controls employed with the corridor lighting to mimic the day/night light cycle utilizing an astronomical time clock and automatic dimming controls. Lighting levels begin at 3 fc at dawn …
Mid morning …
Noon: slowly increase to 35 fc at noon, and finally dim back down to 3 fc at dusk and through the night to repeat again the next day. This cycle helps to maintain the patient’s circadian rhythm which improves recovery time. Nurses’ stations are equipped with override controls to bring the corridors to full brightness in the event of an emergency. The performance of the system has provided patients and staff an improved experience. The dimming of the corridors occurs seamlessly. Patients and nurses are oblivious to it occurring.
Depicted in photo is the loss of power, where nightlights provide 100% light output.
Patients typically only have control of the ambient fixture above their bed. Design at Fairview allows for control of all luminaires in the room from the patient bed. This control is made possible using low voltage relays and switching. Non-critical nurse calls are reduced by the increased control the patients have over their environment. The project was within budget and certified LEED/NC v2.2. Return on investment is expected through energy savings and improved efficiencies. The added benefit of efficiency provides an energy cost savings of over 40% and lamp life is calculated to be increased by over 30%.
The Lighting Controls Association is pleased to welcome a new member: Douglas Lighting Controls.
A member of the Panasonic Group, Douglas engineers end-to-end energy efficient, easy to install and use, digital lighting control solutions for commercial buildings, campuses, and sports complexes throughout North America. Douglas systems include relays panels, controllers, occupancy/vacancy sensors, daylight sensors and wall switch stations.
Douglas has a dedicated design team that produces system drawings and a technical support group for product questions and onsite system commissioning.
With over 50 years in operation, Douglas is recognized for their deep understanding of lighting control systems and ability to provide the right solution for each facility.
Click here to learn more about Douglas Lighting Controls.
The below video describes Nedap’s Luxon smart lighting solution, which provides wireless control of luminaires.
Hubbell Building Automation has launched an intelligent lighting control that simplifies installation with auto-configuration. The NXTM Room Controller provides energy-code compliance right out of the box.
The NX Room Controller integrates automatic and manual control of lighting. No network or software is required to set up the unit. Users benefit from intuitive energy-saving control over the lighting in their space.
Input devices such as digital wall switches, vacancy/occupancy sensors and daylight sensors plug into the NX Room Controller and are auto-configured to default operations. All device communication is over standard CAT5 cables that simplifies installation and eliminates wiring errors.
More advanced configuration of dimming and daylight functions can be accomplished using a free smart phone app. Through an optional Bluetooth® module, the NX Room Controller connects directly to both Android™ and iOS® devices.
Used as a stand-alone device, the room controller is ideal for spaces that require room-level lighting control, such as classrooms and personal offices. Up to eight NX Room Controllers can be connected. The self-contained intelligent device becomes the hub of an advanced distributed lighting control platform.
Click here to learn more.
Eaton Corporation offers a library of application guides, notes and whitepapers related to its lighting control products on its website.
Click here to check out the company’s offerings.
Universal Lighting Technologies, Inc. has announced a partnership with BlueVolt, a provider of online Learning Management Systems (LMS) for the electrical and other service industries, to launch Universal University, a new digital training experience.
Universal University building industry professionals a 24/7 interactive online learning experience. Course participants can learn about various product categories, including how the lighting industry is shifting from fluorescent to LED technology.
Universal has six courses currently available with plans to add more courses this year. Topics include: Ballast Basics, Lighting with LED, LED Fixtures and Retrofit Kits, LED Linear Solutions, and LED Drivers.
Click here to learn more.