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Top R&D Achievements Honored at DOE Solid-State Lighting Workshop PDF Print E-mail
Written by Steve Heising   
Feb 05, 2010 at 10:35 AM
http://apps1.eere.energy.gov/news/progress_alerts.cfm/pa_id=297

Top R&D Achievements Honored at DOE Solid-State Lighting Workshop

February 5, 2010

Nine research and development project teams were honored today at "Transformations in Lighting," the seventh annual U.S. Department of Energy (DOE) Solid-State Lighting (SSL) R&D Workshop, held this year in Raleigh, North Carolina. The three-day event brought together more than 350 researchers, manufacturers, and other industry insiders and observers interested in keeping up to date on the latest solid-state lighting technology developments.


Notably,
  • Cree, Inc. was recognized for significant improvements in its cool-white multichip LED prototype, which demonstrated record efficacy of 117 lm/W.
  • Universal Display Corporation was recognized for moving toward the development of commercially viable white OLED panels by fabricating a white OLED that achieves 68 lm/W.
  • Philips Lumileds Lighting, LLC was recognized for improving warm-white LED performance by demonstrating an LED with an efficacy of 83 lm/W.

    • However accoding to Navigant Consulting Report they are going to have to get to 140 lm/watt  and get a lot less expensive to compete with 3rd and 4th generation T8 fluorescent technology. 
    But 117 lm.watt is moving in the right direction. 

    Life Cycle Assessment of Ultra-Efficient Lamps
    SPMT08_069
    Final Report to the
    Department for Environment, Food and Rural Affairs
    5th May 2009


    Navigant Consulting (Europe) Limited
    Attn: Michael Scholand
    24 Monument Street
    London, EC3R 8AJ
    Tel: 0207 469 1111
    Fax: 0207 469 1110





    Note the orange line is the incandescent and the purple line with the lowest over all impact  is the T5 Fluorescent.  I suspect that the 100 lumen per watt T8 Plus  curve is similar to the T5 if not even better.  T8’s are compatible with existing fixtures and with electronic ballasts.  The T8’s can produce at 100 lumens per watt.  The T8 operate optimally at a cooler optimum temperature of 25o C or room temperature.  T5’s are optimum at 35o C.  When cooled to room temperature, the light output falls off by 5%.  Linear T8’s are still the lowest lifecycle cost alternative. 

    One notes that the dedicated LED is really no better than the CFL and if the CFL are recycled the LED may be worst overall.  In order to get inside the purple line, the LEDs will have to improve by 120% going from 65 lm/W to 143 lm/W.  Linear fluorescent lamps already hit 100 to 120 lm/W and plasma lighting is reaching 143 lm/Watt.
    A number of projections are made about future efficiency potential for the technologies but you can buy and install what they don't make. 
    Last Updated ( Feb 05, 2010 at 10:37 AM )
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    NIST Physics Laboratory Optical Technology Division
    Color Rendering of Light Sources

     
    Figure 1

    A Color Quality Scale (CQS) is being developed at NIST with close contacts with the lighting industry and the CIE to address the problems of the CIE Color Rendering Index (CRI) for solid-state light sources and to meet the new needs in the lighting industry and consumers for communicating color quality of lighting products, The CQS evaluates several aspects of the quality of the color of objects illuminated by a light source. This metric involves several facets of color quality, including color rendering, chromatic discrimination, and observer preferences. The method for calculating the CQS is derived from modifications to the method used in the CRI. Though simulations support for the appropriateness and usefulness of the proposed metric, visual tests are being planned. The results of the vision experiments will be used to improve upon and eventually verify the CQS, which is to be proposed as a new international standard.

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