streetlight vs top light

streetlight

noun
  • The light produced by these lights. 

  • Any large outdoor light used to illuminate a public area, usually urban. 

top light

noun
  • Light from above; toplighting. 

  • Any glazing above a main window, partition or door 

  • A skylight. 

  • The upper (and usually smaller) part (casement) of a window, often hinged a the top 

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