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The F series of CIE illuminants represents

  • A.the spectra of light emitting diodes of various types
  • B.a set of representative fluorescent lamp spectra
  • C.the family of daylight illuminants at various temperatures
  • D.a set of filtered tungsten sources used in laboratories

Answer: B

Twelve members cover halophosphate, broadband and triphosphor types. F11 in particular is widely used to test for metamerism under narrow band light. It represents a very common commercial lamp. Shop lighting is frequently of this type.

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