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Erfan Sanat Esfahan

How is the quality of an LED lamp determined?

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Views : 38

By conducting tests established by the National Standard of Iran, the quality of an LED lamp can be determined. According to this standard, a lamp is considered high quality if it passes a series of electrical, photometric, safety tests, durability tests, luminous flux maintenance tests over 1000 hours, luminous flux group maintenance tests, and tests related to torque resistance, torsional strength, and bending.

The test conditions and the scoring criteria for each test are detailed in the Iranian National Standard No. 1-14878 and 2-14878, titled “Determination of Quality Rating for LED Lamps and Luminaires.” A total of 3,000 points are allocated for the 21 tests, and the details of the score for each test can be found in the standard.

If any of the following issues are observed, the lamp is considered to be of poor quality and is rejected:

  • A reduction in the measured luminous flux of the lamp to less than 90% of the nominal luminous flux.
  • A luminous flux maintenance factor of less than 90% after 1000 hours of operation.
  • An energy efficiency rating of less than “A”.
  • Non-compliance with the specified protection grade.
  • Failure to meet the specified torque resistance for the lamp’s cap.
  • Achieving less than 60% of the total quality score.
  • Failure to comply with the required labeling.
  • Failing the lamp cap replaceability test.
  • Non-compliance with safety standards.

Finally, the quality rating of different lamps is determined based on the score achieved, provided that none of the rejection criteria are observed:

Quality Rating A:
100% ≥ Quality Score ≥ 80%

Quality Rating B:
80% ≥ Quality Score ≥ 60%

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