The differences and similarities of luminaire distributions that would produce optimum uniformity of horizontal illumination, pavement luminance, and vertical illumination are explored. This is done by calculating the required candlepower at various angles to produce the three idealized results. The resulting candela distributions are then plotted and analyzed with regard to their ability to produce the contrast levels required for visibility at various vehicular speeds in accordance with the visibility metric. A unique new method of plotting the visibility or contrast results of an installed streetlighting system in terms of the area of roadway over which such results are achieved is disclosed and illustrated.

  • Availability:
  • Corporate Authors:

    Illuminating Engineering Society

    120 Wall Street, 17th Floor
    New York, NY  United States  10005-4001
  • Authors:
    • Ewing, J L
    • Keck, M E
  • Publication Date: 1978-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00183274
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: HS-023 536
  • Files: TRIS
  • Created Date: Dec 29 1978 12:00AM