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
1.0 Introduction and Scope
2.0 Normative References
4.0 Physical and Environmental Test Conditions
5.0 Electrical Test Conditions
6.0 Test Preparation
7.0 Test Procedures
8.0 Data Processing
9.0 Procedures for Application-Distance IES File Generation
10.0 Reporting Requirements
Illuminating Engineering Society. ANSI/IES LM-91-22, Approved Method: Application Distance Radiometry. New York: IES; 2022.