In an effort to determine how lamp type, size, and the luminaire design effect the collection of dust and dirt and to what degree the luminaire is limited in its operation, two different types of light sources were tested. Details are outlined of the photometric tests conducted on the luminaires when clean and after operation is a dust chamber. A 180-watt low-pressure sodium lamp (LPS) outperformed the 400-watt, H400A33-1, clear mercury lamp (rated 19,667 lumens) in these tests, and is the superior luminaire with regard to maintenance of luminous intensity, efficiency and coefficients of utilization. The use of the LPS lamp is considered advantageous in these days of energy conservation.

  • Corporate Authors:

    Illuminating Engineering Society

    120 Wall Street, 17th Floor
    New York, NY  United States  10005-4001
  • Authors:
    • Romano, P
  • Publication Date: 1974-12

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 30-32
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00265175
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 29 1975 12:00AM