Can LEDs Be Seen in Fog as Well as Incandescent Lamps?

Light emitting diode (LED) light sources are increasingly being used for airfield lighting because of their potential advantages in terms of energy savings and increased reliability. They also may have some benefits for visibility such as increased accuracy of color identification compared to incandescent airfield lighting and rapid onset and offset times that may increase their conspicuity in flashing-light applications such as runway guard lights (RGLs). Because of the narrower spectral distribution of colored LED signal lights compared to incandescent lights, they tend to produce more saturated colors and as a consequence, sometimes appear brighter than their incandescent counterparts. The present paper reviews research findings and technical information on the perception by human observers of LED aviation lighting in inclement weather such as fog, compare to that of incandescent signal lighting. Three types of visual responses are described: color identification, brightness perception, and detection of flashing lights.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References;
  • Pagination: 6p
  • Monograph Title: 2014 FAA Worldwide Airport Technology Transfer Conference Proceedings: Innovations in Airport Safety and Pavement Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01538192
  • Record Type: Publication
  • Report/Paper Numbers: S10101
  • Files: TRIS, ATRI, USDOT
  • Created Date: Sep 9 2014 7:07AM