LED Phosphor & Fluorescents Testing


State-of-the-art phosphor, fluorescence, and stress testing for developing the next generation of LED illumination

Did You Know?

  • The output of LED lights has been doubling nearly every year since the 1960’s – today’s LED lights produce more than 300 lumens per watt.
  • Isamu Akasaki and Hiroshi Amano won the Nobel Prize in 2014 for their invention of blue LED in the 1990s, finally enabling LEDs to produce white light we use today.

As the competitive LED lighting market continues to evolve at a rapid pace, the reliability of phosphors over time is a critical building block in making technical and operational progress. CSA Group offers some of the most advanced testing protocols for LED phosphors in the world, even creating our own tests and equipment where we see opportunities to serve you. We also have a robust High Irradiance Stress Testing program to ensure the safety and longevity of your LED luminaires. We can use our phosphor and high irradiance stress testing to evaluate your next product prototype or contribute to the development of your next breakthrough product.

Testing and Evaluation Services

See how CSA Group provides innovative phosphor, fluorescence, and stress testing to take your LED products to market with confidence

As the global leader in LED testing, we invented a phosphor testing protocol that’s entirely independent of the LED – so our clients can create the best LED lighting products. We apply that type of innovation and passion to every service we offer.

White LED Phosphor Testing and Evaluation

Traditional testing systems for white light LEDs involve irradiating the phosphor with the LED for a long period. But the effects of aging on the LED itself can skew phosphor measurement. CSA Group developed our total fluorescence efficiency test specifically for the characterization of phosphor lens materials – completely independent of an LED. It’s the only testing protocol of its kind. With this unique dual-integrating sphere system, we test opaque, semi-transparent, or transparent sample LED phosphor materials for:

  • Spectral reflectivity
  • Spectral transmissivity
  • Spectral absorbance
  • Spectral fluorescence (forward, backward)
  • Donaldson radiance factor (reflected, transmitted)
  • Optical throughput (normalized)

High Irradiance Stress Testing

High-Irradiance Stress Testing is useful to manufacturers of SSL lighting components, including plastic lensing, phosphors, automotive, adhesives, and reflectors. CSA Group’s protocol utilizes our Elevated Temperature Irradiance Chamber (ETIC) to evaluate the deterioration of plastic samples and phosphors exposed to blue light irradiance and elevated temperatures. You can also request alternate wavelengths for custom test conditions. We stress the samples to a maximum common irradiance across the chamber of approximately 150,000 W/m2 and can set the test at 100-hour increments.

Other LED Testing & Measurement Services

We offer an array of testing and measurement services to ensure your LED products are of the highest quality and ready for market entry in the most efficient time frame possible.

  • Photometric and Lumen Maintenance Testing – LM 79 and LM 80 Luminaire Testing
  • LED Horticultural Lamp Testing
  • CEC Title 24 Joint Appendix 8 (JA8)
  • Eye Safety (ANSI/IESNA RP-27)
  • Unified Glare Rating
  • Flat Panel Display Testing
  • High-Irradiance Stress Testing
  • ETΦ LED Characterization (Electrical-Thermal-Optical)
  • Angular Distribution Characterization

Shop Standards

Explore key standards in the LED testing that help get your products to market.

With expertise in everything from ENERGY STAR to LM-79 to photobiology to high irradiance longevity, CSA Group is the world expert in LED standards and certification.


Get your LED products tested, inspected, and certified for compliance, reliability, and global market access.



Transform your innovations into quality products that meet critical requirements with our expert LED testing services.



Launch new products and boost customer confidence in North America and beyond with our global certification services

Marks & Labels

Marks & Labels

Get the marks you need to access and enter your target markets in North America with confidence.

Value-Added Services

Value-Added Services

Save time and gain efficiencies with access to our customer portal, online product listings, and more.

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White Paper

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