What does the term "flicker" in LED lights refer to?

The term "flicker" in LED lights specifically refers to rapid fluctuations in light output. This can manifest as a strobing effect, where the light intensity oscillates significantly and quickly, often at rates perceptible to the human eye. Flicker can be caused by variations in the electrical current supplied to the LED, leading to an inconsistent illumination level. This is particularly relevant for individuals who are sensitive to light changes, as flicker can contribute to discomfort, headaches, or eye strain.

In contrast, variations in color temperature would pertain to the different hues that light can exhibit, such as warm or cool whites, which do not directly relate to the concept of flicker. Changes in brightness over longer periods may describe a dimming effect but do not involve the quick fluctuations that define flicker. An inconsistent power supply to the fixture can cause flicker, but the term itself specifically denotes the rapid changes in light output rather than the wider issue of power supply stability.