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. |
