A light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). It's a unit of astronomical distance.

A micrometer (symbol: µm) is an SI unit of length equal to one millionth of a meter. It's often used for microscopic measurements.

While not a common practical conversion for everyday use, it's done to illustrate the vast difference in scale or for specific theoretical calculations where unit consistency is needed across different measurement regimes.

2 light-years is equal to 1.8922e+22 micrometers.