Myths and facts of dual-frequency operation of LED lamps

Light Emitting Diode (LED) lamps are capturing the global lighting market at a rapid pace, and a wide research is being carried out to understand the potential implications of these devices. Similar to other consumer electronic devices, various international brands of LED lamps are rated for 50 Hz as well as 60 Hz operating frequency. This study aims to present the myths and facts of operating the same LED lamp at two different standard operating frequencies and analyze the key power consumption and power quality parameters. Interharmonics and supraharmonic emissions have also been tried to be captured as a part of this power quality analysis. A number of residential LED lamps of a range of power consumption from three reputable international brands, and three different wattages LED streetlights have been tested as part of this research. Results suggest that not all the LED lamps are precisely tuned to both these frequencies, and therefore, there is a variation in power consumption, and power quality parameters were noticed.