TSP PressNew Photometrics Standard Approved2001-03-21 The American National Standards Institute's Board of Standards Review approved E1.9-2001, Reporting Photometric Performance Data for Luminaires Used in Entertainment Lighting, as American National Standards on 21 March 2001. ANSI E1.9-2001, Reporting Photometric Performance Data for Luminaires Used in Entertainment Lighting specifies how the output of a stage or studio luminaire should be reported so that people can have a fair and detailed representation of an instrument on paper. In the past, manufacturers have used a variety of ways to describe an instrument's performance. This has made it difficult, if not impossible, to compare the equipment of different manufacturers without actually operating them side by side. ANSI E1.9-2001 describes ways of presenting photometric performance data that will make these comparisons easier. Particular emphasis is placed on reporting how the intensity of illumination varies across an illuminated area, rather than simply how bright the area is in the middle and how wide the area is. The standard is designed to work equally well for spotlights, near-field instruments, and cyc-lighting units.
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