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CATEGORY: Topics » Education and Tools
By Lighting Controls Association, on November 21, 2011
Last month at LightingControlsAssociation.org, we published an article about how to establish daylight zones in sidelighted (windowed) building spaces. We looked at an industry rule of thumb and then how the latest generation of energy codes and standards address it.
In review, when designing an energy-saving daylight harvesting control system, a critical decision is to establish lighting control zones, identifying lighting loads to be separately controlled. Before this decision can be made, however, we must first determine the daylight zones.
A daylight zone, also called the daylight area (expressed in square feet) is defined by the ASHRAE/IES 90.1-2010 energy standard as “the floor area substantially illuminated by daylight.” In other words, it should consistently receive significant quantities of daylight.
By identifying daylight zones, the lighting control system designer identifies areas where daylight harvesting control is appropriate. The designer can then make further decisions about how many control zones are appropriate for the given daylight zone, and their configuration.
In this article, we will examine methods for establishing daylight zones in toplighted building spaces, such as spaces with skylights, roof monitors and clerestories.
Rule of Thumb for Toplighted Daylight Zones
For toplighted spaces, a rule of thumb is that a daylight zone can be established as the skylight length or width plus 1/2 the ceiling height on each side, and a second zone as the skylight length or width plus the ceiling height on each side.
 Image courtesy of the Lighting Research Center. If a space is uniformly lighted using skylights as shown below, with properly spaced skylights covering about 3-5% of the floor area, the entire space may be considered a daylight zone suitable for daylight harvesting control.
 Image courtesy of Acuity Brands Controls. Energy Codes/Standards And Toplighted Daylight Zones
As stated in last month’s article, daylight zones are increasingly being determined by codes and standards, notably the 2009 IECC model energy code, ASHRAE/IES 90.1-2010 model energy code, ASHRAE 189.1-2009 model green building code and California’s Title 24-2008 (state energy code). These codes and standards all require that daylight zones be established around toplighting apertures, and general lighting in these zones be separately controlled from other lighting. The dimensions of the daylight zone are defined and adjusted based on elements in the space that would limit daylight availability, such as tall obstructions (e.g., walls and stacks).
Codes and standards may recognize one or more of the following types of toplighting:
Skylights
Let’s begin with skylights. Below is a short reference to how the latest generation of codes and standards establish daylight zones, or daylight areas, in spaces toplighted using skylights. Note that CH = ceiling height (floor to ceiling), and OH = obstruction height—the height of permanent obstructions (to daylight distribution) such as walls and permanent storage stacks.
The below graphic illustrates the daylight zoning requirements. In each case, a wall restricts the daylight zone in the north because the distance between the skylight and the wall is less than the ceiling height (IECC 2009) or 0.7*CH (ASHRAE 189.1-2009).
ASHRAE/IES 90.1-2010 and Title 24-2008 use a different system that addresses how likely the permanent partition will block the daylight. If the distance between the skylight and the obstruction is less than 0.7*CH and greater than 0.7*(CH–OH), then the front of the partition (facing the skylight) marks that boundary for the daylight zone.
Further, IECC 2009 and ASHRAE 189.1 reduce the given daylight zone dimension to 1/2 the distance to the nearest skylight or vertical fenestration, while the daylight zone in ASHRAE/IES 90.1-2010 and Title 24-2008 is reduced by the outermost boundary of any nearby primary sidelighting zone or roof monitor daylight zone.
Let’s look at a sample problem:
We have 10 skylights that are each 18 ft. from each other, providing illumination in a space with a ceiling height of 20 ft., and bounded on all sides by ceiling-height walls 10 ft. away. Under IECC 2009, what are the dimensions for each skylight daylight zone?
Under IECC 2009, 1/2 distance (D) between skylights (9 ft.) < CH (20 ft.) and D to any nearby partition, so the zone around each skylight would be the skylight length or width + 1/2 D between it and its nearest skylights (9 ft.). The exception is the dimension facing the walls, which would be limited by the distance between the skylight and those walls (10 ft.), as D to these nearby partitions < CH (20 ft.).
Now suppose we added a 15 ft. tall warehouse stack 10 ft. from the edge of a skylight. Under ASHRAE/IES 90.1-2010 and Title 24-2008, would that stack limit that skylight’s daylight zone?
The distance between the skylight and the stack (10 ft.) > [0.7*(CH-OH)] (3.5 ft.) and < 0.7*CH (14 ft.), so the stack would limit the boundary of the daylight zone extending toward the stack to 10 ft. In this scenario, any obstruction over roughly 5 ft. in height would impose a limitation on the dimensions of the daylight zone.
Now suppose the northern row of skylights is 20 ft. from a windowed wall with a primary sidelighted daylight zone of 15 ft. Under IECC 2009 and ASHRAE/IES 90.1-2010, would there be any limitation to the daylighting zone?
Under IECC 2009, the answer would be yes. The windows are 20 ft. away from the skylight, and 10 ft. < CH (20 ft.) and there is no intervening partition, so the daylight zone would be halved to 10 ft.
Under ASHRAE/IES 90.1-2010, the answer is also yes. The windows are 20 ft. away, so the outermost edge of the primary sidelighted daylight zone is 5 ft. away. As 5 ft. < (0.7*CH, or 14 ft.), the northern daylight zone for these skylights would extend 5 ft. toward the windows.
What if, for theoretical purposes, we add a ceiling-height vertical obstruction 2 ft. away from the skylight? Would the daylight zone be limited to 2 or 5 ft.?
Anytime the limitations are in conflict, common sense dictates that the closer one applies, in this case the obstruction 2 ft. away, as it would block any light from extending the extra 3 ft.
Roof Monitors And Clerestories
Now let’s move on to roof monitors and clerestories, which are recognized by ASHRAE/IES 90.1-2010 and ASHRAE189.1-2009.
ASHRAE/IES 90.1-2010 specifically recognizes roof monitors, which it defines as “vertical fenestration integral to the roof.” Below is a summary of the ASHRAE/IES 90.1-2010 requirements:
The below graphic illustrates the daylight zoning requirements.
Let’s look at a sample problem:
We have a roof monitor with a width of 10 ft. and a monitor sill height of 20 ft., meaning the daylight zone would extend 20 ft. from the vertical glazing. A 14-ft.-tall vertical obstruction, placed 15 ft. from the monitor, protrudes into the daylight zone, and the outermost edge of a primary sidelighted daylight zone is 18 ft. away from the glazing. Under ASHRAE/IES 90.1-2010, what are the dimensions for this daylight zone?
The daylight zone would normally be 10 ft. wide and extend from the glazing 20 ft. (the MSH), or an area of 200 sq.ft. However, the primary sidelighted daylight zone is 18 ft. away, which is less than the MSH, so that would limit the zone to a depth of 18 ft. The distance to the vertical obstruction (15 ft.) > MSH – OH (6 ft.) and < MSH (20 ft.), so it too would limit the zone to a depth of 15 ft. along the front face of the obstruction. Basically, in this scenario, any obstruction over 5 ft. in height would impose a limitation on the dimensions of the daylight zone.
Finally, ASHRAE 189.1 recognizes clerestories, roof monitors and clerestory roof monitors. In review, ASHRAE/IES 90.1-2010 defines clerestories as “that part of a building that rises clear of the roofs or other parts and whose walls contain windows for lighting the interior.” Below is a summary of the ASHRAE 189.1 requirements.
The below graphic illustrates the daylight zoning requirements.
Once the daylight zones are established in a space, we can then decide whether daylight harvesting control is warranted, how many control zones we will need (including what loads will be covered by each controller), and what control method or methods—switching, dimming, etc.—we will use. Each of these areas may be covered by separate code/standard requirements.
By Craig DiLouie, on October 12, 2011
When designing an energy-saving daylight harvesting control system, a critical decision is to establish lighting control zones, identifying lighting loads to be separately controlled. Before this decision can be made, however, we must first determine the daylight zones.
A daylight zone, also called the daylight area (expressed in square feet), is defined by the ASHRAE/IES 90.1-2010 energy standard as “the floor area substantially illuminated by daylight.” In other words, it should consistently receive significant quantities of daylight during the day.
By identifying daylight zones, the lighting control system designer identifies areas where daylight harvesting control is appropriate. The designer can then make further decisions about how many control zones are appropriate for the given daylight zone, and their configuration.
In this and a second article to be published next month here at LightingControlsAssociation.org, we will examine methods for establishing daylight zones based on prevailing energy codes and standards. This month, we will cover the most common type of daylighting—sidelighting, or daylight entering a space through vertical fenestration such as windows. Next month, we will cover toplighting (e.g., skylights) applications.
Energy Codes/Standards And Sidelighted Daylight Zones
Daylight zones are increasingly being determined by codes and standards, however, notably the ICC’s 2009 International Energy Conservation Code (IECC) (model energy code), ASHRAE/IES 90.1-2010 (model energy code), ASHRAE 189.1-2009 (model green building code) and California’s Title 24-2008 (state energy code). These codes and standards all require that daylight zones be established adjacent to sidelighting apertures, and general lighting in these zones be separately controlled from other lighting. Regional and national design firms working in multiple jurisdictions and project types may find themselves determining daylight zones using up to four or more definitions that have many similarities but also significant differences.
Basically, each code or standard defines the dimensions of a daylight zone, and then identifies elements in the space that could limit these dimensions, such as tall obstructions (e.g., walls) and other daylight apertures. Additionally, some codes and standards recognize a difference between primary and secondary sidelighted daylight zones, with control in primary zones typically being mandatory, and control in secondary zones being encouraged through power credits.
Below is a short reference to how these codes and standards establish daylight zones in sidelighted spaces (vertical glazing below the ceiling), which, depending on the code or standard, may be called daylight areas. Note that window height (WH, also called window head height) is formally defined in ASHRAE/IES 90.1-2010 and ASHRAE 189.1-2009 as the distance from the floor to the top of the glazing. Also note that the main limitation to the daylight zone is the presence of some type of permanent partition, which may be defined slightly differently across the four codes and standards.
Here we see these rules presented visually in an example space. In each case, the width of the daylight zone is limited by the wall located 1 ft. to the north of the window. In each case, the depth is limited by the wall located southeast of the window, which is located at a distance that is less than one window head height deep into the space.
Some codes and standards, notably the ASHRAE/IES 90.1-2010 energy standard and California’s Title 24-2008 energy code, also establish secondary daylight zones. In the case of sidelighting applications with vertical fenestration such as windows, these are daylight zones extending deeper into the space, controlled separately from primary daylight zones and other general lighting in the space. This level of control is not mandatory but instead encouraged through the use of power credits—that is, a multiplier increasing available watts for the controlled lighting load. If you save energy, the code/standard says, you can have a more power.
As the below graphic illustrates, in each case, the secondary sidelighted daylight zone should be the same width as the primary zone, and another window head height in depth, with the same limitations in regards to 60-inch or taller permanent partitions.
Once the daylight zones are established in a space, we can then decide whether daylight harvesting control is warranted, how many control zones we will need (including what loads will be covered by each controller), and what control method or methods—switching, dimming, etc.—we will use. Each of these areas may be covered by separate code/standard requirements.
Next month, we will examine how to set up daylight zones in toplighted spaces.
By Lighting Controls Association, on October 10, 2011
 The Lighting Controls Association is pleased to announce that it has updated EE201: Introduction to Lighting Control, a popular offering in the Association’s Education Express series of online distance education courses about lighting controls.
The course, authored by Craig DiLouie, principal of ZING Communications, Inc. and LCA’s Education Director, provides an introduction to daylight harvesting and in-depth discussion for each major decision during the design of a daylight harvesting control system. It consists of three learning modules covering these topics:
• Purpose of daylight harvesting
• Typical energy savings
• Typical system
• Importance of transparency
• Ideal applications
• Daylight harvesting and LEED
• Daylight harvesting and energy codes
• Switching versus dimming
• Open versus closed loop
• Control zoning
• Control zoning: daylight availability
• Control zoning: windowed spaces
• Control zoning: skylighted spaces
• Control zoning: energy codes
• Control zoning: granular zoning
• Control zoning tool
• Photosensors
• Photosensors: range of response
• Photosensors: spatial response
• Deadband
• Wireless sensors
• Centralized versus distributed controls
• Analog versus digital controls
At the conclusion of each learning module, an optional online comprehension test is available, with automatic grading; a passing grade (70+%) enables the student to claim education credit.
EE201: Daylight Harvesting is registered with the National Council on Quality in the Lighting Professions (NCQLP), which recognizes a total of 4 LEUs towards maintenance of Lighting Certified (LC) certification. This course is also registered with the California Advanced Lighting Control Training Program (CALCTP) for credit to qualify to receive live training (30 points).
By Craig DiLouie, on September 19, 2011
As demand for lighting controls continues to grow, advanced solutions are becoming increasingly specified while also becoming increasingly sophisticated. This increasing sophistication translates to greater owner benefit but can also pose greater risk of design and installation mistakes.
In a perfect world, designers create clear and detailed lighting control requirements that are easily installed by the installer and the owner. In the real world, however, the owner may not have clear expectations about their lighting. Further, the designer may not provide clear design intent, the installer may make errors and, if anything goes wrong, users will complain.
For the designer, the key is to clearly express the design intent, or the basis of design, so as to provide a common roadmap for the functionality of the lighting control system.
The question is: How?
While there is no standard for communicating design intent, designers have a number of tools at their disposal:
The written lighting control narrative describes the lighting controls, including a sequence of operation, or description of system outputs in response to various inputs. Device settings include occupancy sensor time delay and sensitivity adjustments, integrated dimmer presets, time schedules for relays, and other programming and calibration. Control zoning visually reveals what control devices control what loads. One-line wiring diagrams visually reveal how all of the control devices connect and their relationship to each other. Specifications and cut sheets describe the products used and desired baseline levels of performance. Lighting and electrical panel schedules assign loads to specific dimmers or switches in the panel. And performance testing criteria tell the commissioning authority and electrical contractor how and what to test the system for after installation, and criteria for acceptance.
The written control narrative could be considered most important because it informs everything else, and yet it is often missing in project documents. Going beyond what drawings can communicate, it provides a common guide and reference for the project. Specifically, it can be used to support contract document and specification preparation, provide clear direction during bidding to contractors and manufacturers, give the commissioning authority criteria for testing and accepting the control system, and tell the owner how their control system operates.
Designers benefit by accessing a common roadmap describing the lighting control system’s intended functionality, which increases the likelihood of satisfying the owner. Contractors and manufacturers have clear direction for bidding. Installers are less likely to commit costly errors. The commissioning authority knows what to test, how to test it, and criteria for acceptance. And the owner is more likely to receive a quality product, increasing the likelihood of acceptance.
 (Click on the image to enlarge for easier viewing; enlarged image will appear in a new window; click the back button to return to the article.) Problems and fixes matrix illustrating the relative degree of difficulty (and expense) of correcting problems during construction, and whether a controls narrative would likely make an impact on avoiding these problems. Image courtesy of The Weidt Group. This type of documentation may become common in the future as commercial building model energy codes address documentation and commissioning. ASHRAE/IES 90.1-2010 requires the following documentation be delivered to the owner within 90 days after acceptance of the control system: record drawings of the actual installation, submittal data for all controls, recommended schedule for inspection and recalibration, and a complete control narrative showing “how each lighting control system is intended to operate, including recommended settings.”
A basic control narrative might include at least two main elements. First, a general description of the project goals and delivered control strategies deployed to satisfy these goals. Second, a description of the control system and sequence of operations for each space type. The document may change or be fleshed out over time as the project moves from the pre-design (programming) to design (schematic design, design development, construction documentation) to construction and occupancy and operations, with changes reviewed and approved at each step.
 (Click to download as XLS file.) Example of a matrix approach to creating a control narrative. The matrix identifies spaces or space types and control strategies implemented within each; on the far right, number codes reference the wiring diagrams and a detailed sequence of operations for each space or space type. Here is an example of very general project goals, including relevant codes, for a new office building:
“The lighting controls must meet the mandatory control requirements as defined in the ASHRAE/IES 90.1-2007 energy standard. Select control strategies implemented by the lighting systems go beyond these requirements to support LEED certification.”
Ideally, the owner will provide clear direction to inform the project goals. Following is a general description of the control strategies used in the project. Here’s an example:
“The interior lighting controls will enact two primary strategies intended to minimize energy consumption: 1) automatic shutoff via occupancy sensors in small, enclosed spaces and via a timeclock-based low-voltage control system in larger, open spaces, and 2) daylight harvesting in all spaces receiving high, consistent levels of daylight contribution, notably the main lobby and private and open office spaces. In certain spaces lacking daylight and where personal safety is an issue, such as corridors illuminated by electric lighting, select lights will remain ON at all times during normal hours of occupancy. In presentation spaces, notably the meeting and training rooms, flexibility will be provided to enable users to select preset light levels. Lighting controls will also turn exterior lighting ON/OFF using a photocell/timeclock based on curfew (grounds lighting) or dusk-to-dawn operation (security lighting).”
Following the project description is a lighting control system description, including a sequence of operations—a description of what the controls in each space do in response to inputs such as occupancy, time events or daylight levels.
This could take the form of a written description produced in a simple and consistent format; a matrix providing an at-a-glance view for each space type or each individual space (room numbers pulled from the drawings), an approach well suited to complex projects.
Back to our example, we will be deploying manual-ON, timeclock-OFF for general lighting in the open office spaces in our office building, and daylight harvesting dimming in perimeter zones receiving sufficient levels of daylight. The control narrative for the manual-ON and timeclock-OFF switching controls (code 2 under the “sequence of operations” column on the matrix) might read (adapted from the Department of Energy’s Commercial Lighting Solutions webtool):
“ON/OFF control of the general lighting in each open office area will be controlled by a combination of manual wall switches and timeclock schedule functionality residing in a low-voltage relay panel-based control system.
“Users entering the space at the start of business hours will turn the general lighting ON by control zone, with each zone being within 2,500 sq.ft. in area or per the local energy codes.
“At 6:00 PM, the control system will blink several times, warning users that the lights will turn OFF in five minutes. At 6:05 PM, the control system will turn the general lighting OFF. Users working afterhours may keep the lights ON, or turn the lights back ON, by toggling the manual wall switches, which function as a 120-minute override for the timeclock automatic shutoff system.
“After 120 minutes, the system will blink the lights again, and sweep them OFF five minutes later unless the override is again activated.”
Using this basis, we might add even more information—the more detail, the better:
“The control system shall be programmable at a microprocessor-based central processing unit (CPU). The system shall provide weekly routine and annual holiday scheduling and automatically adjust for leap year and daylight savings time. Each program shall not exceed 25,000 sq.ft. or one floor, whichever is smaller. The control system shall have 10-year nonvolatile memory that stores all schedules. The system shall be able to reboot the program and reset the time schedule and current time, without errors, following power outages up to 14 days in duration. The system shall export lighting energy consumption reports by space and zone. The control system shall operate independently of but be capable of communicating with the building automation system, if present.”
From there, we could also add performance testing and criteria for acceptance. For the above low-voltage relay control system, this might include ensuring that the general lighting in each zone turns OFF at the scheduled time, the sweep is properly preceded by a blink or other warning, and the overrides are properly zoned and working.
Finally, we could add references to other pertinent documents, such as wiring diagrams, control zoning and equipment specifications and cut sheets.
Producing a written controls narrative entails more effort at the front end, but can deliver strong project benefits. By providing clear expectations for lighting control system functionality, designers will more likely deliver a quality product, contractors will more likely provide an error-free installation and properly calibrate and program the system, the owner will more likely properly maintain it, and users will more likely accept it.
By Lighting Controls Association, on August 25, 2011
 The Lighting Controls Association is pleased to announce that it has updated EE101: Introduction to Lighting Control, a popular offering in the Association’s Education Express series of online distance education courses about lighting controls.
The new course, authored by Craig DiLouie, principal of ZING Communications, Inc. and LCA’s Education Director, offers an overview of lighting controls, covering:
• Benefits of lighting controls, including visual needs, energy management, energy code compliance and sustainability
• Basic functionality of lighting controls: inputs and outputs
• Manual versus automatic as an input
• Dimming versus switching as an output
• Manual control—how it works, typical energy savings, typical applications
• Occupancy sensing—how it works, typical energy savings, typical applications
• Time scheduling—how it works, typical energy savings, typical applications
• Daylight harvesting—how it works, typical energy savings, typical applications
• Demand response
At the conclusion of the course, an optional online comprehension test is available, with automatic grading; a passing grade enables the student to claim education credit.
EE101: Introduction to Lighting Control is registered with the National Council on Quality in the Lighting Professions (NCQLP), which recognizes a total of 1.5 LEUs towards maintenance of Lighting Certified (LC) certification. This course is also registered with the California Advanced Lighting Control Training Program (CALCTP) for credit to qualify to receive live training.
By Lighting Controls Association, on August 3, 2011
The Illuminating Engineering Society’s New York City Section (IESNYC) has announced the date for its second annual program on state-of-the-art lighting control systems: CONTROL THIS!
The Lighting Controls Association is proud to sponsor this important industry event.
Control This! 2011 will take place on Thursday, October 20, 2011 at The Metropolitan Pavilion, 125 West 18th Street, 2nd Floor Gallery in New York City.
More than 500 lighting design community members are expected to attend this trade show and lecture series dedicated to the challenges facing the industry in lighting controls and energy management technologies. Control This! 2011 will offer guests the choice of six programs within two tracks: Construction and Commissioning. Attendees will see firsthand the latest innovations and product development in the rapidly growing fields of lighting controls and energy management systems by viewing the latest innovations on display by the industry’s leading manufacturers. Check the website for details on speakers and specific sessions.
Exhibit hours are from 11:30 PM to 6:00 PM. Educational CEU accredited presentations will begin at 12:00 PM through 5:30 PM.
To register, visit www.iesnyc.org or www.controlthis.org. On-line registration will open on August 20, 2011. Discounted admission for IES, DLF and Lighting Controls Association members (pre-registration required). Students are encouraged to attend as a complimentary guest with preregistration and ID.
By Lighting Controls Association, on March 21, 2011
 Lighting Controls Association members will present “Design of Electric Controls for Daylighting,” a three-hour workshop, during the Daylighting Institute at LIGHTFAIR 2011.
The workshop, presented by David Weigand, LC, LEED-AP of Leviton, Gary Meshberg, LC, LEED-AP of Encelium and A. J. Glaser of HUNT Dimming, will occur Sunday, May 15, 2:00-5:00PM.
Energy efficiency through daylighting can only be realized when electric lights are dimmed or switched. This workshop provides information about daylight harvesting control strategies and technologies in a case study format for real-world context, focusing on current approaches, main issues and emerging technologies (e.g., automatic calibration/commissioning, use of multiple sensors), including use of open and closed loop sensing, photosensor characteristics, control algorithms and commissioning.
Learning Objective 1: Learn about various technologies and equipment types used to harvest daylight into energy savings.
Learning Objective 2: Achieve an understanding of what constitutes good and bad daylighting and how to design a daylight harvesting control system. Students will be engaged in an interactive format to solve real-world problems via a case study approach supplemented by handouts.
Learning Objective 3: Learn about how to properly commission and set up a daylight harvesting control system, with handouts including a generic specification, specification punch list, and detailed commissioning procedures.
Learning Objective 4: Student will engage in problem-solving using real-world examples.
This workshop has been presented by these very knowledgeable industry veterans since 2009 and consistently scores high marks from attendees.
If you’re attending LIGHTFAIR this year in Philadelphia and interested in learning about daylight harvesting controls, be sure to register and attend this workshop.
By Lighting Controls Association, on February 17, 2011
 Image courtesy of Randy Burkett Lighting Design. The Lighting Controls Association is pleased to announce that EE300: Lighting Control of LEDs, a key offering in the Association’s popular online Education Express distance education courses, has been updated.
Residing at the Association’s website, Education Express provides in-depth education about lighting controls and controllable ballast technology, application, system design and commissioning, as well as meta-issues such as energy codes, daylighting and other trends.
In recent years, LED technology has transcended its traditional stronghold—saturated colors in indicators, exit signs and so-called architainment applications, representing most LED products sold today—and began offering viable white light options in niche architectural applications such as lighting for outdoor and small, confined indoor spaces. As the technology continues its steady advance, applications have begun to expand into a broad range of mainstream commercial lighting applications.
Just as with conventional lighting systems, a critical consideration in applying LEDs in building environments is control. LED controls be used to create a virtually infinite array of color output, or modulate the warmth or coolness of white light LED sources. They can allow dimming of LED light sources to occupant preference. And they can automatically shut off or dim lighting in response to control signals from inputs such as photosensors, scheduling devices, PCs and others.
EE300: Lighting Control of LEDs, broken into three learning modules with an extensive appendix detailing various typical applications, describes the fundamentals of how LEDs work and are controlled (part 1), control of color LEDs (part 2) and control of white LEDs (part 3). The goal of the course is to provide a working understanding of LEDs and methods for integrating them into modern lighting system design.
At the conclusion of each of these three learning modules, an optional online comprehension test is available, with automatic grading; a passing grade enables the student to claim education credit. EE300: Lighting Control of LEDs is registered with the National Council on Quality in the Lighting Professions (NCQLP), which recognizes a total of 6.6 LEUs towards maintenance of Lighting Certified (LC) certification.
By Lighting Controls Association, on February 7, 2011
The New York City section of the Illuminating Engineering Society will host a seminar, “Control This!” on Tuesday, March 8, 2011, from 6:00 PM to 8:00 PM. The seminar will provide an overview of the latest developments in lighting controls.
Where? Mariner’s on the Hudson, 46 River Rd, Highland, NY.
The cost is free to IESNYC members and $15 for non-members.
Click here for more information and to register.
By Lighting Controls Association, on January 12, 2011
 GE Lighting has published an informative guide to linear fluorescent lamp dimming, available here.
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