Evaluation of the Electrical Performance of LED Luminaires Under Continuous and Cyclic Operating Regimes
Abstract
This study characterizes the electrical behavior of two LED luminaire models operating under continuous and cyclic regimes in controlled laboratory conditions. Measurements were carried out over 24-hour intervals using a Class A power quality analyzer configured in accordance with IEC 61000-4-30, IEC 61000-4-15, and IEC 61000-4-7 standards. Total harmonic distortion, third-harmonic content, and long-term flicker were evaluated and compared across four operating patterns. Results show that the multipanel tubular luminaire maintains stable performance across all regimes, with flicker indices within normative limits and moderate harmonic variations. Conversely, the high-power compact luminaire exhibits greater thermal and electrical sensitivity during continuous operation and long duty cycles, with significant increases in Plt and low-order harmonics. However, its stability improves under higher switching-frequency regimes. Findings demonstrate that driver architecture is a determining factor in electromagnetic compatibility and operational stability of LED lighting systems, highlighting the importance of integrating power quality criteria into luminaire selection for residential and commercial applications.
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