HPS LAMPS FOR USE ON HPM BALLASTS

New high-pressure sodium (HPS) lamps have been designed to operate interchangeably with existing high-pressure mercury (HPM) lamps on certain types of HPM ballasts. These new lamps offer about 50 percent greater light output than HPM lamps at a 14 percent savings in energy consumption. Tests with a 150-watt interchangeable HPS lamp and a standard 175-watt HPM lamp on a 175-watt HPM ballast show that the interchangeable lamp has both a faster warm-up and a shorter hot restart time than the mercury lamp. Unlike mercury lamps, starting is not a function of ambient temperature, and the interchangeable HPS lamps are usable at extremely low temperatures.

• Corporate Authors:

  Illuminating Engineering Society

  120 Wall Street, 17th Floor
  New York, NY  United States  10005-4001
• Authors:
  • Collins, B R
  • McVey, C I
• Publication Date: 1975-9

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 18-24
• Serial:
  • Lighting Design and Application
  • Volume: 5
  • Issue Number: 9
  • Publisher: Illuminating Engineering Society

Subject/Index Terms

• TRT Terms: Design; Economic efficiency; Electric power; Low temperature; Luminous intensity; Mercury vapor lamps; Performance; Pressure; Sodium vapor lamps; Track ballast
• Uncontrolled Terms: Ballast; Efficiency; High pressure
• Old TRIS Terms: Exchanging; Mercury lamps; Sodium lamps
• Subject Areas: Design; Economics; Highways; Railroads; Safety and Human Factors;

Filing Info

• Accession Number: 00127045
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 18 1975 12:00AM