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Technology Fact Sheets; don’t stand in your way of valuable knowledge!

This page contains links to fact sheets describing solid-state lighting, its characteristics, applications, and issues relating to its successful introduction into the marketplace.

LED Basics

• Comparing White Light LEDs to Conventional Light Sources
  Compares current LED products to conventional lighting on the basics: energy efficiency, life, lumen depreciation, light output/distribution, and color quality (4 pages, October 2008)
• Color Quality of White LEDs
  Review of basics regarding light and color; summary of the most important color issues related to white light LEDs, including recent advances (2 pages, January 2008)
• Thermal Management of White LEDs
  Review of the role of heat in LED performance, and methods for managing heat in LED system design (2 pages, June 2009)
• Energy Efficiency of White LEDs
  Overview of lighting energy efficiency in general, and the rapidly evolving status of white LEDs (2 pages, June 2009)
• Lifetime of White LEDs
  Overview of lumen depreciation, measurement of LED useful life, and features to look for in evaluating LED products (2 pages, September 2009)
• LED Frequently Asked Questions
  What retailers, energy efficiency advocates, and consumers need to know to make informed buying decisions (2 pages, May 2011)

LED Application Series

• LED Application Series: LED Replacements for Four-Foot Linear Fluorescent Lamps
  Comparison of LED linear replacement lamps to fluorescent lamps in terms of light output, distri­bution, color quality, energy efficiency, and cost-effectiveness. (4 pages, May 2011)
• LED Application Series: Light at Night and Human Health
  Discussion of potential health implications of light at night (LAN) exposure and how it may affect lighting practice and design (2 pages, January 2010)
• LED Application Series: LED Replacements for Incandescent Omnidirectional Lamps
  Overview of white-light LED replacement lamps, and how they compare to traditional incandescent omnidirectional lamps (4 pages, October 2009)
• LED Application Series: Recessed Downlights
  Comparison of the energy and lighting performance of downlights using different light sources (2 pages, January 2008)
• LED Application Series: Portable Desk/Task Lighting
  Description of LED desk/task lighting application and comparison with fixtures using traditional light sources (2 pages, February 2008)
• LED Application Series: Kitchen Undercabinet Lighting
  Overview of the advantages and disadvantages of using LEDs in under cabinet lighting products (2 pages, February 2008)
• LED Application Series: Outdoor Area Lighting
  Review of the concerns and potential for LED luminaires in outdoor area lighting applications (6 pages, June 2008)
• LED Application Series: Using LEDs to Their Best Advantage
  Exploration of the unique attributes of LEDs, which may make them the right choice for some applications (4 pages, January 2008)
• LED Application Series: Dimming LEDs
  Overview of dimming technology and the prospects for dimming LEDs in residential applications (2 pages, February 2008)

LED Measurement Series

• LED Measurement Series: Color Rendering Index and LEDs
  Discussion of the use of the color rendering index with LEDs, while a revised color quality metric is being developed (2 pages, January 2008)
• LED Measurement Series: Solid-State Lighting Standards
  Review of the key performance and safety standards applicable to LED-based lighting products (2 pages, September 2009)
• LED Measurement Series: Luminaire Efficacy
  Overview of luminaire efficacy and the technical reasons for its applicability to LED-based lighting fixtures (2 pages, September 2009)
• LED Measurement Series: LED Luminaire Reliability
  Outline of the issues concerning long-term performance and reliability of LED luminaires, and suggestions for interpreting LED product life claims (4 pages, October 2009)
• LED Measurement Series: Understanding Photometric Reports for SSL Products
  Overview and discussion of typical elements in IES LM-79 photometric reports for LED luminaires and LED integral replacement lamps (4 pages, June 2009)

LED Performance Specification Series

• LED Performance Specification Series: T8 Replacement Lamps
  Provides benchmark information on fluorescent T8 lamps and a suggested minimum performance specification for LED T8 replacement lamps (2 pages, April 2010)

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