Lumen-maintenance testing for LED lamps, light engines and luminaires (MAGAZINE) 01 Feb 12
Now that procedures are in place to make long-term lumen-maintenance projections for LED components, efforts are being made to develop methods for testing the lighting system as a whole, as JIANZHONG JIAO explains. |
Test and Measurement News: Gamma Scientific, Instrument Systems, Labsphere 26 Jan 12
Both Gamma Scientific and Instrument Systems have introduced low-cost CCD array spectrometers, Instrument Systems has introduced a production source and measure unit for use in production spectral light testing of LEDs and wafers, and Labsphere has appointed one of its executives to head its sales operations in Canada. |
LUX-TSI earns UKAS accreditation, Labsphere earns NVLAP accreditation 20 Jan 12
LUX-TSI has earned accreditation from UKAS to test LED and lighting products, while Labsphere has been recognized by NVLAP as a NIST-traceable calibration laboratory. |
Mentor Graphics addresses thermal modeling and testing for LEDs and luminaires 12 Dec 11
Mentor Graphics has announced a combination of hardware and software products that allows accurate thermal modeling of LEDs and luminaires in the design phase. |
Production testing of HB-LEDs and LED modules demands the right hardware and techniques (MAGAZINE) 29 Nov 11
Cost-effective testing of LEDs and LED modules in a production environment can have a strong influence on manufacturing efficiency, as MARK CEJER explains. |
IEA Annex releases draft SSL performance tiers 11 Nov 11
A solid-state lighting program run by the International Energy Agency (IEA) has released draft performance tiers for four different SSL product types. |
LED-based products must meet photobiological safety standards: part 1 (MAGAZINE) 19 Oct 11
The reappraisal of the place of LEDs in safety standards has had a significant impact on the process of bringing to market not only LED-based products, but any product containing non-laser sources of optical radiation, writes LESLIE LYONS. |
UL’s lighting division signs partner agreement with LUX-TSI Ltd 07 Oct 11
A UK-based testing company for solid-state lighting has signed a partnership agreement that will enable UL to expand its lighting services in Europe. |
Cree launches TEMPO luminaire testing program
28 Sep 11
Aimed at Cree’s LED component customers, the TEMPO luminaire testing and evaluation program includes 21 key test points across thermal, electrical, mechanical, photometric, and optical design elements.
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WEBCAST: General Performance Testing for Lighting in North America 17 Aug 11
This webcast will discuss performance testing of LED luminaires and lamps to LM -79, looking at the requirements of programs such as Energy Star. The second part will focus on lumen-maintenance testing to LM-80, measurement best practices and upcoming revisions to the standard. |
Cooper Lighting's Photometric Laboratory awarded continuing NVLAP accreditation 14 Apr 11
Continuing NVLAP accreditations have been awarded to Cooper Lighting's Photometric Laboratory, including complete LM-79 testing for SSL luminaires. |
Pro-Lite acquires SphereOptics GmbH 11 Apr 11
The combined company is aiming to be the leading provider of light-measurement equipment and optical instrumentation to the European market. |
Radiant Imaging merges with Zemax 28 Mar 11
The merger of two companies involved in optical design software and test & measurement will create a company with a strong focus on the LED market. |
UL acquires Lighting Sciences, Inc. 03 Mar 11
UL has expanded its capacity for photometric testing of lighting products through the acquisition of solid-state lighting test specialist Lighting Sciences, Inc. |
LightSavers LED street-lighting pilot project yields encouraging results (MAGAZINE) 10 Feb 11
A pilot SSL street-light project in Caledon, Canada tested LED luminaires from three manufacturers. Maury Wright describes the generally positive results for illuminance, uniformity, and lumen depreciation after a full year since deployment. |
Instrument Systems receives major order from Korea 24 Jan 11
LG Innotek has placed a large order for LED test equipment with Instrument Systems, and a light-measurement expert has also joined the German company. |
Instrument Systems announces strong year-end results 02 Dec 10
LED test and measurement company Instrument Systems has announced a 47% increase in revenue for its latest business year, and has also delivered its 1000th CAS 140CT series Array Spectrometer. |
Merger of LED measurement companies brings integrating-sphere expertise under one roof (MAGAZINE) 03 Nov 10
Labsphere and SphereOptics, two US-based LED metrology companies, merged earlier this year and are now operating as part of Halma, a holding company that is eyeing further acquisitions, as Kevin Chittim and David Leighty explain. |
LED product safety standard requires ongoing updates (MAGAZINE) 03 Nov 10
The UL 8750 product-safety standard has established a set of requirements for LED-based lighting products and the components needed to operate them. However, maintaining the standard during this period of rapid technological advancement is a daunting task, says Tom Blewitt. |
Miniature spectrometers address challenges of LED research and production (MAGAZINE) 03 Nov 10
Miniature, portable spectrometer systems can provide accurate in-situ measurements and analysis of LED light sources for a variety applications, including horticulture, according to Jason Eichenholz, Marco Snikkers and Dennis Schulmerich. |
DOE unveils Caliper round 11 results, approved SSL testing labs 25 Oct 10
The US DOE has released summary results from Round 11 of its CALiPER testing program, and has also published a list of ten testing labs added to the NVLAP directory of accredited laboratories for SSL testing. |
Daintree announces lighting-control platform and first partnership 14 Sep 10
Daintree Networks launches the ControlScope lighting control platform for SSL and other energy-efficient lighting options and partners with Easylite. |
WEBCAST: Testing Times - Standards and Measurement Requirements for LEDs and Luminaires 03 Aug 10
This webcast discusses standards and measurement requirements for LEDs and luminaires, and is applicable to specifiers, designers and manufacturers of LED-based products. |
NIST develops CQS alternative to CRI for color quality specs
15 Jun 10
The National Institute of Standards and Technology has developed the Color Quality Scale (CQS) that it believes will offer a superior indication of color quality compared to CRI specifications. |
LED lighting community benefits from ongoing standardization efforts (MAGAZINE) 24 Apr 10
Industry input is providing valuable feedback on the LED lighting standards that have already been put in place in the USA, while further standardization efforts are continuing, writes JIANZHONG JIAO. |
Instrument Systems buys the Light Measurement Division of X-Rite 03 Mar 10
Instrument System forms Berlin based Optronik subsidiary to integrate X-Rite's Optronik-branded light measurement product portfolio. |
UL acquires Luminaire Testing Laboratory 10 Feb 10
UL, a product safety certification organization, has acquired a laboratory approved for Energy Star qualification testing of LED lighting products. |
Gooch and Housego rebrands Optronic Laboratories and ChromoDynamics 31 Jan 10
Parent company rebrands business units, and LED-centric test and measurement instruments will now carry the Gooch and Housego brand. |
Labsphere acquires fellow test company SphereOptics 27 Jan 10
Two companies with strong involvement in LED test and measurement have joined forces. |
LRC method reduces energy consumption of street lighting 05 Nov 09
The LRC says that replacing traditional, yellowish high-pressure sodium lights with cool-white light sources can reduce the amount of electric power used for lighting while maintaining or even improving visibility in nighttime conditions. |
Letter to the Editor: US certification of LEDs 28 Oct 09
The Nationally Recognized Testing Laboratory program dictates which labs are allowed to carry out product safety testing of LED lighting in the USA.
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MAGAZINE: Air temperature emerges as a crucial factor in determining lumen maintenance 13 Oct 09
Cree has gathered a large amount of data that demonstrates the importance of air temperature, along with junction temperature and drive current, in defining the lumen depreciation of LEDs. TIM WHITAKER reports. |
LSD 51-2009 defines functional and decorative applications of LEDs 07 Sep 09
A white paper from NEMA and ALA clarifies the differences between functional and decorative LED-based luminaires, and discusses how to specific and evaluate these products. |
Labsphere and Orb Optronix in measurement collaboration 05 Jun 09
Two US-based light measurement companies have announced a far-reaching collaboration to encompass product development, manufacturing and distribution. |
MAGAZINE: Asking the right questions helps to educate customers and suppliers alike 02 Jun 09
Awareness and education are key aspects of market transformation, and there are now a number of tools to help improve the purchasing process, writes Brian Owen. |
French CITADEL project looks at LED lighting in buildings 27 Apr 09
The research will help French laboratories to qualify commercially available LED lighting products, writes Christophe Martinsons. |
Why 2008 was the Year of LED Standards 23 Apr 09
In the first of a series of articles, Kevin Dowling explains the importance of standards for LED lighting and looks at the significant progress that has been made so far. |
WEBCAST: LED Luminaire Photometry & Performance Testing 04 Mar 09
Our most recent Webcast discussed the fundamental aspects of performance testing of solid-state lighting fixtures, covering recently-introduced standards and equipment options. |
ASSIST guidelines shed light on effectiveness of nighttime illumination 26 Feb 09
Recently revealed research shows that conventional photometry may misestimate the effectiveness of some light sources used at night. |
French R&D program to test LED lighting for indoor illumination 18 Feb 09
The CITADEL program will develop measurement protocols and benchmarking analyses of LEDs, and methods to assess the aging and life expectancy of LED lighting products.
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Time to stop ignoring light losses from residential fixtures 18 Feb 09
Luminaire efficacy testing will help buyers and builders choose efficient residential lighting fixtures and accelerate the rate of energy savings achieved, writes James Brodrick. |
Osram OS: LEDs in Jing Jiang, and thermal models online 13 Feb 09
Osram Opto Semiconductors has been busy lighting up a main street in Jing Jiang City, China, and providing thermal models of its LEDs online to aid in system design.
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NIST researchers describe new approach to LED measurement 27 Nov 08
The new technique allows correlation between pulsed, instantaneous measurements and steady-state DC measurements. |
DOE releases two new Caliper benchmark reports 20 Nov 08
The reports address the mixed-results performance of 1) incandescent A-type and decorative lamps and LED replacements, and 2) halogen incandescent MR16 lamps and LED replacements. |
WEB EXCLUSIVE: Upfront thermal simulation helps SureFire design products for life or death situations 07 Nov 08
CFdesign's tool has give given the company the chance to virtually test ideas and optimize designs before physically prototyping the product. |
Labsphere and Otsuka partner on spectral flux measurement systems
28 Oct 08
The new systems provide a more efficient and practical means for testing forward emitting light engines.
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Instrument Systems reports most successful business year 01 Oct 08
The German test and measurement specialist has reported EUR 9.3 million in revenue for the 2007-2008 fiscal year. |
Bentley selects ProMetric photometer to test LED instrument panels 08 Sep 08
Pro-Lite Technology has supplied a ProMetric CCD imaging photometer to Bentley Motors to assist in the development and testing of LED sources used in their vehicles. |
Absolute photometry has relative benefits for LED and SSL performance evaluation
14 Aug 08
Photometric testing methods are changing in response to the increased adoption of solid-state lighting, explains Ian Lewin.
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LED standards published in the US 01 Jul 08
Two standards relating to LED chromaticity and photometric measurements have already been published in 2008, and more are in the pipeline. |
CALiPER Round 4 of SSL product testing shows mixed results 21 Feb 08
Further testing of SSL products by the DOE's SSL program shows a wide performance range and a continuing disparity between manufacturers' claims and actual test results. |
LED luminaire performance: changing traditions can set the right expectations 20 Feb 08
LED technologies can show radically different photometric performance and life when used in different application environments. Photometric data produced according to traditional testing standards are not very useful for LED luminaires, according to Nadarajah Narendran, Jean Paul Freyssinier, and Jennifer Taylor. |
LED luminaire performance: changing traditions can set the right expectations 03 Dec 07
LED technologies can show radically different photometric performance and life when used in different application environments. Photometric data produced according to traditional testing standards are not very useful for LED luminaires, according to Nadarajah Narendran, Jean Paul Freyssinier, and Jennifer Taylor. |
TECH NOTES: Illuminating evidence - a breakthrough in power LED lifetime data helps manufacturers build and deploy reliable lighting solutions 19 Nov 07
A graphical representation of lifetime in terms of both drive current and junction temperature provides the optimum data for designers, says Steve Landau of Philips Lumileds. |
LED safety and the evolution of international standards 25 Oct 07
For the purposes of LED safety analysis, newer standards use lamp-based rather than laser-based criteria. However, with continued improvements in LED performance, safety standards for LED are still evolving, according to Neil Haigh and Geoff Archenhold. |
Philips awarded NIST contract (corrected version) 17 Oct 07
Philips has received a federal contract to develop a spectrally-tunable light source that will help NIST investigate alternative metrics that might eventually replace CRI. |
Cal-Optics and Everfine to supply LED test equipment 26 Sep 07
Cal-Optics has partnered with Everfine, the world's largest producer of light and LED measurement equipment, to make products available in the US. |
DOE issues final Energy Star criteria for SSL products 14 Sep 07
As part of the US strategy to accelerate market introduction of LED-based products, these will now be able to obtain Energy Star certification from September 2008. |
LRC group provides guidance on under-cabinet and directional LED lighting 13 Jun 07
The Lighting Research Center has published two new ASSIST Recommends volumes to assist in the selection and evaluation of specific LED lighting products, writes Jennifer Taylor. |
UL launches safety standard for LED lighting products 23 May 07
Underwriters Laboratories is working towards a safety standard that will cover the sale of LEDs and LED fixtures in the North American market. |
Standards required for further penetration of solid state lighting
17 May 07
The solid-state lighting industry urgently needs standards to assist its growth and to avoid hype and negative reactions. The good news, says Kevin Dowling, is that standards work is proceeding rapidly in a number of directions. |
Hunter seeks realistic LED performance data 15 May 07
The keynote speaker at Strategies in Light did not hold back in his view that the LED industry needs to urgently address the inaccurate representation of LED performance in the industry. |
Lumileds presents new analysis of power LED reliability 04 May 07
A new method of looking at statistical data for LED lifetime and reliability should help bridge the gap between LED makers and lighting designers, says Lumileds. |
LED luminaires fall short in initial round of testing 28 Feb 07
LED luminaires have faired poorly in a pilot round of testing conducted within the U.S. DOE's Solid State Lighting (SSL) program. |
DOE releases draft Energy Star requirements for SSL luminaires 01 Jan 07
As part of its strategy to accelerate market introduction of LED-based luminaries, the US DOE is seeking to extend its Energy Star program to these products. |
