Product Code:SAE J2938
Title:LED Light Sources Tests and Requirements Standard - Part 2: LED Lumen Maintenance Measuring
Issuing Committee:Lighting Standard Practices Committee
Scope: Part 2: LED Lumen Maintenance MeasurementsScope: Part 2 of this document provides the methods of the measurement of lumen maintenance of LED device (component, packages, arrays and modules) only. Lumen maintenance is a characteristic measured under controlled conditions. Performance in a particular application may be different. This approved method does not provide guidance or make any recommendation regarding predictive estimations or extrapolation for lumen maintenance beyond the limits of the lumen maintenance determined from actual measurements.
Rationale: Part 2: LED Lumen Maintenance MeasurementsScope: Part 2 of this document provides the methods of the measurement of lumen maintenance of LED device (component, packages, arrays and modules) only. Lumen maintenance is a characteristic measured under controlled conditions. Performance in a particular application may be different. This approved method does not provide guidance or make any recommendation regarding predictive estimations or extrapolation for lumen maintenance beyond the limits of the lumen maintenance determined from actual measurements.