CIE 238:2020 PDF Download

The standard also addresses the characterization of AC LEDs for solid-state lighting (SSL) applications. It provides guidance on the essential parameters to be measured, such as spectral power distribution, total luminous flux, color coordinates, chromaticity, and correlated color temperature. The standard emphasizes the need for accurate and reproducible measurements, considering factors such as the temperature dependence of LED characteristics and variations in the AC power supply.

CIE 238:2020 highlights the importance of thermal management in AC LEDs and provides recommendations for maintaining a stable junction temperature during measurements. It also discusses measurement uncertainties and the necessary precautions to be taken to minimize errors. The standard aims to ensure accurate and comparable data for AC LEDs, enabling users to make informed decisions regarding their selection and application in SSL systems.

In summary, CIE 238:2020 is a comprehensive standard that focuses on the optical characterization of AC LEDs for SSL applications. It provides guidelines for performing accurate measurements, taking into account the unique challenges posed by AC operation and the thermal sensitivity of LED characteristics. By standardizing measurement methods and procedures, the standard aims to enhance the reproducibility and reliability of data, enabling effective evaluation and implementation of AC-driven LEDs in lighting systems.