Investigation of harmonic generation from low wattage led lamps

Sohel Uddin, Hussain Shareef, Azah Mohamed, M. A. Hannan

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Light Emitting Diodes (LEDs) are versatile and energy efficient when compared to the conventional light sources. LEDs represent a transformational change in how light is produced. However, there are significant differences between conventional lighting sources and LEDs in terms of voltage and current operating requirements which may affect the power quality (PQ) of AC mains. Therefore, this paper investigates one of the main PQ related harmonic generations from LED bulbs available in the market. It is done by conducting laboratory tests on various LED lamps and tapping the load current behaviour under different conditions. Then frequency domain analysis is performed to investigate the generated harmonics. Harmonic levels of different wattage, combinations of various LED bulbs and Compact Fluorescent Lamps (CFLs) are experimentally evaluated and compared. The results show that most of the LED lamps produce high level of harmonics and it is comparable with respect to harmonics generated from CFLs.

Original languageEnglish
Pages (from-to)4215-4221
Number of pages7
JournalJournal of Applied Sciences Research
Issue number8
Publication statusPublished - 2012
Externally publishedYes


  • CFLs
  • LED lamps
  • Power quality
  • Total harmonic distortion

ASJC Scopus subject areas

  • General


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