This Approved Method applies to lighting equipment having a total field angle of less than ten degrees. This includes equipment in which light is controlled by reflectors, lenses, or their combinations. The document applies to projectors with a variety of light sources, including tungsten filament, tungsten-halogen, and high intensity discharge lamps. It does not apply to projector systems composed of arrays of light emitting diodes.
Page count: 19 pages
Publisher: Illuminating Engineering Society (2020)
SKU: ANSI/IES LM-11-20
1.0 Introduction and Scope
2.0 Normative References
3.0 Nomenclature and Definitions
4.0 Physical and Environmental Test Conditions
5.0 Electrical Test Conditions
6.0 Testing Procedure Requirements
7.0 Reporting of Data
Illuminating Engineering Society. ANSI/IES LM-11-20, Approved Method: Photometric Measurement of Searchlights Using Incandescent or HID Sources. New York: IES; 2020.