#lightning.flash  the flash of light that accompanies an electric discharge in the atmosphere (or something resembling such a flash); can scintillate for a second or more
  supertype:  #flash  a sudden intense burst of radiant energy
  subtype:  #heat_lightning  bright flashes of light near the horizon without thunder (especially on hot evenings); usually attributed to distant lightning that is reflected by clouds
  subtype:  #sheet_lighting__sheetlighting  lightning that appears as a broad sheet; due to reflections of more distant lightning and to diffusion by the clouds

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