LM-79 Testing

ITL is ISO17025 accredited by the National Voluntary Lab Accreditation Program (NVLAP) to perform IES LM-79 testing

The Illuminating Engineering Society of North America (IESNA) Approved Method for Electrical and Photometric Measurement of Solid State Lighting Products (LM-79-08) is a guide developed for the measurement of solid-state (LED) lighting products. It describes the procedures to be followed and precautions to be observed in performing various measurements for solid state lighting (SSL) products, such as total luminous flux, electrical power, luminous intensity distribution, and various properties of chromaticity.

In recent times, the term LM-79 Testing has become part of our lighting lexicon and has been treated in some cases as a lighting program all its own. While many lighting programs such as DLC and Energy Star reference LM-79 procedures, it is not in and of itself a lighting program with specified requirements and pass/fail criteria.

However, the term LM-79 Testing has come to generally be recognized as two distinct tests – a candela distribution test with an IES file, and an integrating sphere test for a standard color (CCT, CRI, Duv, chromaticity coordinates). Nevertheless, anytime LM-79 is mentioned in reference to desired testing, our staff will verify exactly what the customer requires since many measurement options are discussed in the official document.

CLICK HERE TO REQUEST LM-79 TESTING

If you would like to know more about LM-79 testing and associated applications please give us a call at 303-442-1255. We would be happy to discuss your LM-79 testing needs.

 

LM-79 Testing

ITL is ISO17025 accredited by the National Voluntary Laboratory Accreditation Program (NVLAP) to perform IES LM-82 testing

The Illuminating Engineering Society of North America (IESNA) Approved Method for the Characterization of LED Light Engines and LED Lamps for Electrical and Photometric Properties as a Function of Temperature (LM-82-12) is a document which addresses the changes in photometric performance of SSL light engines and lamps with changes in temperature.

In recent times the term "LM-82 testing" has become part our lighting lexicon and has been treated in some cases as a lighting program all its own. While many lighting programs reference LM-82 procedures, it is not in and of itself a lighting program with specified requirements and pass/fail criteria.

With the advent of the LED being used for more and more lighting industry categories and general illumination, more need has arisen to determine how various light engines and integrated lamps would operate in any given light fixture configuration. With form factors varying from miniaturized recessed downlights to large multi-panel floods, there is increased need to understand the photometric performance of these sources in an array of thermal environments which simulate those form factors and intended environments.

This test method provides photometric performance results (lumens and color) at various elevated ambient temperatures which allow fixture manufacturers to evaluate light engines and lamps and to determine which ones are best suited to the thermal signature of their particular luminaire model. By thermally bracketing the photometric performance of LED light engines and integrated lamps, the designer is able to determine what internal specifications need to be met, including heat sinking properties for optimal performance.

If you would like to know more about LM-82 testing and associated applications please give us a call at 303-442-1255. We would be happy to discuss your LM-82 testing needs.

 

LM-79 Testing

ITL is ISO17025 accredited by the National Voluntary Laboratory Accreditation Program (NVLAP) to perform IES LM-84 testing

The Illuminating Engineering Society of North America (IESNA) Approved Method for Measuring Luminous Flux and Color Maintenance of LED Lamps, Light Engines, and Luminaires (LM-84-14) is a document which addresses the changes in photometric performance of SSL systems over time.

In recent times the term "LM-84 testing" has become part our lighting lexicon and has been treated in some cases as a lighting program all its own. While many lighting programs reference LM-84 procedures, it is not in and of itself a lighting program with specified requirements and pass/fail criteria.

The primary considerations for this test method are lumen maintenance and color maintenance. The term "maintenance" here refers to how a particular metric (lumens or color) performs over time. In the case of lumen maintenance, it is a simple ratio of lumen output at any given time in the life of the product, to the initial lumen output of the product. This essentially means that LM-79 testing is performed initially at 0 hour burn time, and at each required interval over the chosen operating cycle.

The operating cycle in which maintenance testing is performed is up to the customer and may have as many interval tests as needed. For instance, a typical operating cycle for a product seeking Energy Star compliance is 6000 hours, with interval testing at 3000 hours (for interim qualification) and 6000 hours for full certification. ITL can test at any interval over the operating cycle that the customer prefers.

If you would like to know more about LM-84 testing and associated applications please give us a call at 303-442-1255. We would be happy to discuss your LM-84 testing needs.