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The average distance from the Earth to the Moon is about 1.28 light-seconds. This means it takes light about 1.28 seconds to travel from the Earth to the Moon.
The distance to the moon is about 1.3 light seconds or about 0.000000032 light years.
The moon is about 0.0000000406 light years away from earth. Clearly, the moon is MUCH too close (238,000 or 239,000 miles or so) for the distance to be rendered meaningfully in light years.
The light from the full moon takes about 1.28 seconds to travel the approximately 384,400 kilometers to Earth's surface and back.
It takes approximately 1.28 seconds for light to travel around the moon, which means the circumference of the moon is roughly 6,783 miles. Traveling at the speed of light, you could make a full trip around the moon in about 2.56 seconds.