The phenomenon of light-emitting diode (LED) lamps exhibiting an unstable or wavering light output is commonly referred to as LED lamp flicker. This manifestation presents as a rapid, repetitive change in light intensity, perceived as a shimmering or pulsating effect. An example would be an LED bulb in a ceiling fixture showing a stroboscopic effect when observed during movement.
Understanding the causes behind this irregular illumination is significant for maintaining visual comfort and preventing potential health implications like headaches or eye strain. Historically, older lighting technologies also experienced similar issues, but the specific mechanisms at play with LEDs are often unique to their solid-state nature and electronic drivers. Addressing these issues leads to improvements in lighting quality and efficiency.