IEC 61189-3-913:2016 specifies the test methods for thermal conductivity specific to printed circuit boards for high-brightness LEDs. The test applies to printed circuit boards for high-brightness LEDs with surface mounted LEDs or with device embedded LEDs in electronic control devices (ECDs). This first edition cancels and replaces the first edition of IEC PAS 61189-3-913 published in 2011. This edition constitutes a technical revision. This edition focused only on the test methods for thermal conductivity specific to printed circuit boards for high-brightness LEDs.