Machine-translated by Google. Questions are authored in English.
Top

Discussion

Of the following lamp types, the highest luminous efficacy is offered by

  • A.a light emitting diode luminaire
  • B.a tungsten filament lamp
  • C.a tungsten halogen lamp
  • D.a mercury vapour lamp

Answer: A

Modern diode luminaires reach well over a hundred lumens a watt and the best exceed two hundred, against twelve to seventeen for a filament lamp. That factor of ten is why filament lighting has been withdrawn almost everywhere.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.