Month: August 2014

LEDs May Help Astronauts Grow Food on Other Planets

Here’s an interesting application for LEDs: growing food on other planets. Researchers at the University of Guelph’s Controlled Environment Systems Research Facility (CERF) are studying LEDs as a light source…

Red leaf lettuce grown under different spectral conditions resulted in leaves with different colors and tastes

Red leaf lettuce grown under different spectral conditions resulted in leaves with different colors and tastes

Here’s an interesting application for LEDs: growing food on other planets.

Researchers at the University of Guelph’s Controlled Environment Systems Research Facility (CERF) are studying LEDs as a light source that can facilitate plant growth in environments where nutrients and electricity are scarce, such as space and even during colonization efforts of other planets. The result will be a low-power LED system that optimizes its spectral emission to promote plant growth.

CBC has the story here.

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Study Concludes Workers in Windowless Offices Lose 46 Minutes of Sleep Each Night

Research by an interdisciplinary team at the University of Illinois found that office workers in windowed spaces scored better on common self-report health and sleep surveys, averaging 46 minutes of…

daylightResearch by an interdisciplinary team at the University of Illinois found that office workers in windowed spaces scored better on common self-report health and sleep surveys, averaging 46 minutes of sleep per night (measured by sleep monitor) compared to workers without windows.

More evidence that appropriately designed lighting may be preventive medicine? Maybe so, though it begs the question of how well they isolated light as a factor as opposed to human factors such as income, job security, etc.

The study concludes: “We suggest that architectural design of office environments should place more emphasis on sufficient daylight exposure of the workers in order to promote office workers’ health and well-being.”

Click here to read the report.

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IES Releases Two New LED Testing Procedures Documents

The Illuminating Engineering Society has published two new testing procedures standards for LEDs: * IES Approved Method for Measuring Luminous Flux and Color Maintenance of LED Lamps, Light Engines, and…

The Illuminating Engineering Society has published two new testing procedures standards for LEDs:

* IES Approved Method for Measuring Luminous Flux and Color Maintenance of LED Lamps, Light Engines, and Luminaires (LM-84-14)
* Approved Method for Electrical & Photometric Measurements of High Power LEDs (LM-85-14)

LM-84-14 is written to develop standard operating procedures for laboratories to test for these variables and provide reliable results that can be compared against other similar LED light sources.

LM-85-14 was developed to provide uniform test methods to measure the optical performance of LEDs at these higher temperatures, which can be compared with the results of other high power LEDs.

Both LM-84-14 and LM-85-14 are available in print or as a PDF download from the IES at the IES store (here (LM-84) and here (LM-85). LM-84-14 List price: $20.00; IES Member Price: $14.00. ISBN: 978-87995-288-4. LM-85-14 List price: $25.00; IES Member Price: $17.50. ISBN: 978-87995-289-1

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LEDucation 9 Issues Call for Speakers

The Designers Lighting Forum of New York announced its “Call for Speakers” for LEDucation 9, the largest table top exhibition and educational event dedicated solely to the ever evolving LED market and…

The Designers Lighting Forum of New York announced its “Call for Speakers” for LEDucation 9, the largest table top exhibition and educational event dedicated solely to the ever evolving LED market and technology. LEDucation 9 will return to New York City on March 5-6th, 2015 at the Sheraton NY Times Square hotel.

The “Call for Speakers” focuses on a variety of one-hour sessions and dedicated panel discussions targeting some of the hottest topics in solid state lighting technology today and in the future. These sessions will cover a diverse span of industry topics and will attract attendance from the architectural, engineering, OLED and LED technology, theatrical, educational, interior design, construction, building management, energy efficient lighting and controls, and wireless industries.
 
Speaker proposals will be accepted through 5 p.m. EST, October 17th, 2014.

Click here to submit a proposal.

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Product Monday: Soraa Snap Now Available for PAR30, PAR38 and AR111

SORAA recently announced that its innovative SNAP System and new accessories are available for the company’s PAR30, PAR38 and AR111 LED lamps. Previously, it was available only for MR16 lamps….

SORAA recently announced that its innovative SNAP System and new accessories are available for the company’s PAR30, PAR38 and AR111 LED lamps. Previously, it was available only for MR16 lamps.

Due to its bright, point source GaN on GaN LED and prismatic optic, Soraa’s LED lamps can accept a magnet in the center of the lens, enabling a simple accessory attachment mechanism without major impact on light output or efficiency. The innovative, easy-to-use magnetic accessories allow customers to adjust the color, shape and soon direction of the light beam.

Soraa’s SNAP System has won a string of high-profile awards, the most recent being the prestigious 2014 Red Dot Product Design Award.

Click here to learn more.

soraa

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OSRAM SYLVANIA to Relocate HQ

OSRAM SYLVANIA recently announced a plan to relocate its Danvers-based headquarters from 100 Endicott Street in Danvers, MA to 200 Ballardvale Street in Wilmington, MA during the summer of 2015. The…

OSRAM SYLVANIA recently announced a plan to relocate its Danvers-based headquarters from 100 Endicott Street in Danvers, MA to 200 Ballardvale Street in Wilmington, MA during the summer of 2015. The new location will serve as the regional headquarters of OSRAM Americas and will continue to have a strong presence in northern Massachusetts and the New England area. 

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Product Monday: Interlace Suspension by LBL Lighting

LBL Lighting’s Interlace Suspension is a large, aluminum outer ring machine to receive hundreds of stainless steel cable strands for an intricate, woven appearance. LEDs direct illumination toward the cables…

LBL Lighting’s Interlace Suspension is a large, aluminum outer ring machine to receive hundreds of stainless steel cable strands for an intricate, woven appearance. LEDs direct illumination toward the cables for visual interest as well as general lighting. The luminaire can be hung at almost any angle. Includes one 30W 2400-lumen 2700K 80 CRI LED module. Dimmable.

Click here to learn more.

LBL

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LIGHTFAIR Announces 2015 Event Call for Speakers

LIGHTFAIR International recently announced the Call for Speakers for its 2015 event taking place in New York City May 3-7, 2015. Experts from various industries such as architecture, design, engineering,…

LIGHTFAIR International recently announced the Call for Speakers for its 2015 event taking place in New York City May 3-7, 2015.

Experts from various industries such as architecture, design, engineering, exterior and roadway, facility management, government, healthcare, hospitality, alternative energy including solar power, transportation and more are encouraged to submit a proposal.

Courses range in level (general, foundational, intermediate and advanced) and length (60-minute seminars, 90-minute seminars, 3-hour workshops, 1-day courses and 2-day courses).

Submissions and speaker suggestions will be accepted online only from August 11 – September 12, 2014 at 11:59 p.m. EST.

Click here to learn more.

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IES Publishes New Standard on Economic Analysis of Lighting

The IES has announced publication of IES RP-31-14, Recommended Practice for the of Lighting. RP-31-14 provides a framework for the lighting practitioner involved in making important economic decisions relative to…

The IES has announced publication of IES RP-31-14, Recommended Practice for the of Lighting. RP-31-14 provides a framework for the lighting practitioner involved in making important economic decisions relative to lighting such as: selecting from a group of competing lighting designs, establishing when a system under consideration will &#8220pay off,” making energy conservation decisions, and most importantly, gauging the profitability of a capital investment in a lighting system that can be objectively compared to other competing capital investments.

Life Cycle Cost/Benefit Analysis (LCCBA), the most robust among analytical methods, is accepted by experts in managerial economics from all industries and accordingly, is the economic analysis method recommended by the IES. The distinguishing and superior feature of this second-level method is that it includes the time value of money. First-level analysis methods are also covered so that the lighting professional can understand why their use is not encouraged.

RP-31-14 will be available in print or as a PDF download from the IES at the IES store. RP-31-14 List price: $25.00; IES Member Price: $17.50; ISBN: 978-87995-290-7.

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Lighting Research Center Issues New DELTA Report: LED Lighting in a Campus Building

The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute recently evaluated a newly constructed building at Siena College—Rosetti Hall, a 25,000 square foot, 3-story, contemporary brick building that includes classrooms,…

deltaThe Lighting Research Center (LRC) at Rensselaer Polytechnic Institute recently evaluated a newly constructed building at Siena College—Rosetti Hall, a 25,000 square foot, 3-story, contemporary brick building that includes classrooms, meeting rooms, and offices. The New York State Energy Research and Development Authority (NYSERDA) awarded funding to change the lighting specification from the originally specified conventional fluorescent lighting to all light emitting diodes (LEDs), designed by Engineered Solutions of Clifton Park, N.Y., and to have the project evaluated as a DELTA demonstration project by LRC. The 20-page full color, illustrated report, LED Lighting in a Campus Building, detailing the project evaluation and findings, is available for free download from the LRC website.
 
Jennifer Brons, LRC research scientist and DELTA program manager, evaluated the performance of the LED systems in Rosetti Hall, including luminaires, dimmers, and occupancy sensors; measured illuminances in a typical classroom, office, meeting room, common area lounge, hallway, stairs, and restroom; and administered questionnaires to 200 faculty, staff, and students onsite.
 
Key findings of the DELTA report:

*        The LED system saves considerable energy (33%) compared to the fluorescent system originally specified.
*        Overall, most occupants believe their lighting is about the same as or better than similar campus spaces.
*        The LED lighting is indistinguishable from conventional fluorescent lighting due to shielding with opal diffusers and a neutral (4000 K) color temperature.

The LRC evaluation highlights some guidelines and recommendations to operate the LED systems in Rosetti Hall most effectively:

*        Integral occupancy sensors
o   Time delay in offices and meeting rooms should be lengthened to reduce complaints of false-off.
o   When luminaires with integral PIR sensors are used in restrooms, the luminaire closest to the door should be oriented so that it “sees” movement as soon as the occupant enters the space.
o   The auto-on feature is helpful in public spaces without a wall switch, such as restrooms and staircases, but may lead to occupant confusion and energy waste in public spaces that also have switches, such as meeting rooms and utility rooms.
*        Dimmers and switches
o   While questionnaire results showed that instructors preferred downlighting, energy monitoring showed that both uplight and downlight modes were used in the classrooms.
o   Dimmers for LEDs should be specified that can accommodate the size of the load; one type of dimmer at this site did not dim very low in spaces with small loads. A mockup can confirm satisfactory operation of LEDs with proposed dimmers.
o   Controls for multiple layers of light should be clustered and labeled, or use an integrated scene controller.
o   Switches and dimmer controls may be confusing and ineffective in public spaces such as hallways and lounges; controls that provide scheduled turn-on or sweep-off may be more useful in these spaces.

Click here to get the report.

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