Editing Light characteristic (section)

===Quick light===
A quick light, abbreviated "Q", is a special case of a flashing light with a high frequency (more than 30<ref name=LLQuick/> or 50<ref name=LoL/> per minute). If the sequence of flashes is interrupted by regularly repeated eclipses of constant and long duration, the light is denoted "interrupted quick", abbreviated "I.Q".

Group notation similar to flashing and occulting lights is also sometimes<ref name=LoL/> used, e.g. Q(9).

Another distinction sometimes<ref name=LoL/> made is between quick (more than 50 and less than 80 [[flashes per minute]]), very quick (more than 80 and less than 160 flashes per minutes, abbreviated "V.Q") and ultra quick (no less than 160 flashes per minute, abbreviate "U.Q"). This can be combined with notations for interruptions, e.g. I.U.Q for interrupted ultra quick, or grouping, e.g. V.Q(9) for a very quick group of nine flashes. Quick characteristics can also be followed by other characteristics, e.g. VQ(6) LFl for a very quick group of six flashes, followed by a long flash.