DOE publishes research on LED lumen and chromaticity maintenance

The US Department of Energy (DOE) has published new research that is based on analysis of LM-80 testing datasets of 223 separate packaged LEDs to discern component behavior over time relative to lumen maintenance and to chromaticity shift.

The report is completely focused on phosphor-converted white LEDs (pc-LEDs). The four package types studied include polymer-based (sometimes referred to as plastics and common in mid-power), ceramic-based (high-power), COB-array, and two types of CSP LEDs.