New DOE Study Examines Lumen and Chromaticity Maintenance of LED Packages, Based on LM-80 Data - Energy Watch News


New DOE Study Examines Lumen and Chromaticity Maintenance of LED Packages, Based on LM-80 Data

To better inform our understanding of LED reliability over the course of a product’s lifetime, DOE has released the results of a study assessing the four major phosphor-converted LED (pc-LED) package types: ceramic-based, polymer-based, chip-on-board (COB) packages, and chip-scale packages (CSP).LED packages rarely fail abruptly (i.e., suddenly stop emitting light). In most cases, they experience parametric failures, such as degradation or shifts in either color or light output (e.g., luminous flux). In some applications, chromaticity stability—that is, the degree to which the light output maintains its color—is just as important as the light output itself. To better understand chromaticity stability in LEDs, the DOE study evaluated four pc-LED package platforms for luminous flux and chromaticity maintenance, analyzing data sets from LM-80 testing of representative products from many Tier 1 LED manufacturers. https://www.energy.gov/eere/ssl/articles/new-study-examines-lumen-and-chromaticity-maintenance-led-packages-based-lm-80

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