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.
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IES LM-11-20 (R2023)
Original price was: $50.00.$25.00Current price is: $25.00.
Approved Method: Photometric Measurement of Searchlights Using Incandescent or HID Sources
Illuminating Engineering Society , 02/07/2020
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