A technique is described which allows the accurate and rapid evaluation of the illumination at various points on a surface form a large or small array of luminaires. In this technique which provides for the assessment of a more meaningful illumination ratio of maximum-to-minimum illumination, the illumination levels are calculated at predetermined points. The calculation points are defined by the intersection of grid lines that are based on the scale selected by the user. The luminaire to be used, its location and aiming points, and the surface on which the illumination is to be evaluated must be selected by the user. The details are outlined of the calculation (involves the basic laws of inverse-square, and cosine) of illuminations at a point. The procedure is described in terms of flood lighting a horizontal surface such as sports lighting, area lighting, and security lighting. The Program, however, is of more general application. A typical example is included to show the relationship between an actual problem and the resulting computer output.

  • Availability:
  • Corporate Authors:

    Illuminating Engineering Society

    120 Wall Street, 17th Floor
    New York, NY  United States  10005-4001
  • Authors:
    • Helms, R N
    • Miller, R N
  • Publication Date: 1976-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00134009
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 23 1976 12:00AM