IES LM-84-20 PDF Download

The IES LM-84-20 standard outlines a method for measuring the luminous, radiant, and/or photon flux, chromaticity, and other spectral properties of LED lamps, light engines, and luminaires over time. This standard applies not only to LED products but also includes OLED light engines and luminaires.

The document provides detailed procedures and precautions to ensure accurate and reproducible results for measuring luminous, radiant, and/or photon flux, spectral power distribution (SPD), and chromaticity. These measurements are essential for assessing the long-term performance and reliability of LED products in standard operating conditions.

Significantly, the IES LM-84-20 standard reflects the expanding applications of Solid-State Lighting (SSL) products, such as LED and OLED. These products are already widely used in horticulture and other fields, and their adoption is expected to increase in new lighting applications and penetrate additional markets. Consequently, this updated standard now includes the reporting of both photon flux and radiant flux in addition to luminous flux, reflecting the evolving requirements of SSL products and their diverse applications.