16:18 · Two structures, both basic gestalts in Western ideography, are combined in this ideogram. The graph for danger, heat, energy, , is combined with the arrow sign , which stands for directed movement. It is the Western world's most common ideogram for lightning, thunderstorm, and high voltage electric current. It is also a general sign for mythology in some dictionaries, and for the field or subject of electricity in other contexts.
    When it appears in a photographic context (e.g. on cameras), it signifies flashlight or flash bulb.
    Turned upside down, , it is used to indicate television station on certain maps.
    Compare with , radio station, on some maps.
    As a sign for lightning it is rather synonymous with the ancient sign , the staff of Zeus or Jupiter, depicting a bundle of lightnings symbolizing divine power.