TEST OF 400-W HIGH-PRESSURE SODIUM VAPOR LIGHTING (ABRIDGEMENT)

Several test groups of 400-W high-pressure sodium vapor lights were subjected to a 10 hour on, 2-hour off continuous cycle for two years to test the relatibility of manuacturers-supplied lamps mortality data. In general, the average life expectancy of these lamps was for below the 24000 hours advertised for them. While the test data is applicable only for lamps manufactured in later 1971 and early 1972, it is the author's opinion that it justifies considerable skepticism toward manufacturer-supplied data and that users should develop and implement contractual mechanism for enforcing performance specifications in regard to the advertised life of the lamp.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 91-93
  • Monograph Title: TRAFFIC CONTROL DEVICES, GEOMETRICS, VISIBILITY, AND ROUTE GUIDANCE
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00315074
  • Record Type: Publication
  • ISBN: 0309029929
  • Report/Paper Numbers: HS-029 511
  • Files: TRIS, TRB
  • Created Date: Oct 8 1980 12:00AM