The question of whether to use filter (yellow) incandescent light or unfiltered (white) light is examined. The following topics are examined on this study: The optical image in the human eye; light scatter in the atmosphere as present in haze and mist, and the subsequent conditions of visibility, the make-up and function of the human visual system (contrast sensitivity and visual acuity are dealt with in detail); individual function of traffic lights, and the glare of traffic lights in particular; and finally, visual performance with respect to old age. The psychology of perception was formed not to give any useful indication as to preference for a particular color. However, minimal side effects (discomfort glare) were experienced which might indicate a preference for yellow light.

Media Info

  • Features: Figures;
  • Pagination: 54 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00149161
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 1977 12:00AM