Together with Simcenter T3STER thermal characterization hardware, Simcenter TERALED temperature-controlled test stage, forms a combined electrical, thermal, and radiometric/photometric testing station for LEDs and LED modules, creating multi-domain compact models that can be used in Simcenter thermal design software. These LED testing solutions conform to the JEDEC JESD51-52 standard and follow CIE technical reports 127:2007 and 225:2017. Real thermal resistance and light output metrics are measured as a function of real LED junction temperature over a wide range of forwarding current. The process is fully automated. Third party spectroradiometers help capture emission spectra, providing further input for precise modeling of LED package light output properties in lighting design.