fluorescent vs headlamp

fluorescent

noun
  • A fluorescent light. 

adj
  • Glowing as if with fluorescence; vivid 

  • Of or relating to fluorescence. 

  • Emitting visible light as a result of the excitation of phosphors by ultraviolet photons produced by the passage of an electrical current through an inert gas infused with mercury. 

  • Exhibiting or produced by fluorescence. 

headlamp

noun
  • An individual headlight, particularly of a motor vehicle. 

  • A flashlight worn on the head. 

How often have the words fluorescent and headlamp occurred in a corpus of books? (source: Google Ngram Viewer )