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An RGB night light is a night lighting fixture that uses a combination of red, green, and blue primary colors to achieve a variety of color changes. Unlike traditional night lights that emit only a single warm or cool light, RGB night lights can produce a rich variety of color effects.

In professional terms, these products are often referred to as "color-changing LED night lights" or "RGB LED night lights," where RGB stands for the three primary colors of red, green, and blue. By combining different red, green, and blue light sources, nearly any visible color can be generated, thus achieving color-changing functionality.