In near-field conditions the use of far-field IES-format photometric files results in substantially incorrect irradiance, illuminance, or photon-flux density values being predicted by lighting layout models constructed for near-field conditions. This problem can be overcome by using distance-specific IES file(s), generated by first collecting data at the working distance(s) of interest obtained from a single luminaire and then converting them to distance-specific IES file(s), following the protocol described in this document.
Page count: 40 pages
Publisher: Illuminating Engineering Society (2022)
SKU: ANSI/IES LM-91-22
ISBN-13: 978-0-87995-417-8
Citation Format:
Illuminating Engineering Society. ANSI/IES LM-91-22, Approved Method: Application Distance Radiometry. New York: IES; 2022.
