A light that has a light period shorter than its dark period is described as?

A light that has a light period shorter than its dark period is described as flashing. This type of light characteristic is used to convey specific information to mariners about the particular navigational aid. In a flashing light, the rapid intervals of illumination followed by longer periods of darkness help to distinguish it from other types of lights, allowing for better identification of buoys, lighthouses, or other navigational marks.

In maritime navigation, the distinction between different types of light signals is crucial. A flashing light indicates a regular rhythm where the intensity of light increases over a brief period, reflecting a specific signaling purpose. The shorter light period relative to the dark period is a key defining factor of this classification.