title: Color-rendering capability of commercial lamps.
abstract: Evaluation of color-rendering capability of commercial lamps is considered from the point of view of the lampmaker and the typical user, rather than for precision color-matching applications. Only an approximate magnitude of color-rendering capability of a test lamp has meaning for the average user. Only illuminants of superb color-rendering capability are used here as reference illuminants. Such ideal reference illuminants are defined for a range of colors, both on and off the blackbody line. Chromatic adaptation approximates object-color constancy adequately closely as long as both initial and final illuminants have color-rendering capability approximately as good as that of a daylightlike illuminant. These considerations lead to more universal reference illuminants and allow usefully valid comparison of lamps of different colors with acceptable accuracy.
authors.forename: W A
authors.initials: WA
authors.lastname: Thornton