LM 79 Testing Lab and Need and Methods

 What Is LM  79 Testing (Lab)?

LM-79 Testing Lab is an approved method for taking electrical and photometric measurements of SSL products. It covers total flux (light output), electrical power, efficacy, chromaticity, and intensity distribution. The five required metrics on the LED Lighting Facts label come from LM-79 Test Labs results.

(IES)  Illuminating Engineering Society of North America Publishes LM 79-80 In 2008 Approved Methods for the Electrical and Photometric Measurements of Solid-State Lighting Products. Is also Know as LM 79 Testing?

LM-79 Testing captures performance characteristics of products that feature solid-state lighting (SSL) technology, including light-emitting diodes (LEDs). This testing provides a snapshot of performance under specified operating conditions at some point in the life of a product, usually at the beginning of operation— these are referred to as initial measurements. It does not address lifetime ratings, changing performance over time (e.g., lumen maintenance), or LED case temperature.

The LM-79 TestingMethod is applicable to integrated LED products, such as luminaires and replacement lamps. It is not applicable to LED packages, modules, or arrays

LM-79 Testing Lab requires complete luminaire testing on an absolute photometric basis. Typically lighting products are evaluated on a relative photometric basis, where separate tests are done for lamps an luminaires. However, for solid state lighting products the LED lamps typically cannot be separated from their luminaires. The absolute photometric testing required measures the light distribution and light intensity of the complete luminaire.

Need LM-79 Testing certification Testing?

KC India Test Laboratories has received many recent test requests looking for electrical certification testing, including LM-79Testing Standards for performance of LED’s.

LM-79 is the Illuminating Engineering Society of North America (IESNA) approved method for taking electrical and photometric measurements of Solid-State Lighting (SSL) products. LM-79 measures a luminaire or integral lamp as a system and measures light output (flux), electrical power, chromaticity, efficacy, and intensity distribution using standard processes and equipment. These five required metrics are mandatory on LED Lighting Facts labels and come from the results of LM-79 testing.

Some of the recent electrical certification test requests KC India Laboratory has received include:

  • Electrical Laboratory needed for IES Testing of LED Light fittings to Illuminating Engineering Society of North America (IES), LM79 Approved Method for the Electrical and Photometric Measurements of Solid-State Lighting Products.
  • LED rechargeable night light designer is using a China manufacturer and needs Asia laboratory for certification testing.
  • LM 79 Testing Lab needed for handheld LED flashlight testing for lux and candela output. The test will include between 1 – 3 lights. The Flashlights will be tested using White Light, Green Light and Red Light. Lab needs to be certified and accredited as an authority for testing lux and candela according to the FL-1 Standard.
  • Electrical compliance laboratory needed to test LED Christmas lights to obtain certificate of conformity if Christmas light pass safety test

What are the LM-79 test outcomes ?

IESNA prescribes the following uniform parameters to present the data obtained during LM-79 testing.

Photometric Properties

Electrical Properties

Luminous flux (lumens)

Input RMS AC voltage

Luminous efficacy (lumens/W)

Input RMS AC current

Luminous intensity distribution (candelas)

Input AC power

Chromaticity coordinates

Input voltage frequency

Correlated colour temperature (CCT)

Power factor

Colour rendering index (CRI)

Similar for DC powered SSL

What are the limitations of LM-79 Testing?

LM-79 Testing specifies the parameters of individual products and the test data obtained cannot be used to evaluate similar products and carry out lighting calculations.LM-79 Testing does not specify any sampling size. Not specifying the number of samples to be tested leads to manufacturers providing only one sample instead of providing more, thus increasing the vulnerability of lesser quality products.  

KC India Test Laboratories is a state of art testing facility in the Electrical and Electronics discipline, promoted by KC India, located in India.  KC India has a testing facility embedded with Modern Technology for Luminaries Testing, Electrical Testing, LM 79 Testing, IP Testing  IT Testing.

KC India follows internationally accepted practice and protocols for the compliance of Indian and international standards with accurate, prompt and reliable test results. KC India complies With ISO  International Standard For Testing Laboratories, Accredited By NABL (National Accreditation Board For Testing And Calibration Laboratories) and is recognized By BIS – Bureau Of Indian Standards Under Notified Categories Of Electronic Products Under The “Electronics And IT Goods” (Requirements For Compulsory Registration) Order, Of Government Of India, Department Of Electronics And IT.

As the development of LED technology continues to grow and diversify, the need for consistent and standardized testing procedures for LED has become more prevalent than ever. KC India is NABL Accredited laboratory for the  LM 79 Testing, Luminaire Testing .

KC India Test Laboratories LLP has made strides to stay current with the new testing standard LM-79 Testing and Luminaire Testing set forth by the IESNA (Illuminating Engineering Society of North America). In addition, “KCIndia” testing is now a priority when testing our LED light systems for more reliable results.

LM 79 Testing Lab | LM 79 Testing Labs | LM 79 Testing Laboratory | Luminaire Testing Lab | Luminaire Testing Labs | Luminaire Testing Laboratory


Location: Delhi, India

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