News Article
Epistar's high voltage chipset breaks efficacy records
With its higher CRI, and competitive lm/$, the direct red platform is suited for use in warm white applications in retrofit, professional lighting, and luminaires
Epistar Lab has successfully developed a warm white efficacy of 216 lm/W at an operating current of 5 mA and CRI of 87 Ra at CCT of 2700K. Under a typical driving current of 15mA (or about 1 W operational equivalent), the luminous efficacy of 197 lm/W was achieved.
Epistar Lab’s new record adopts several technologies in high voltage chips. These include a novel substrate transfer process, lower MQW light absorption and a structure for increasing the photon extraction efficiency. Improvements have also been made on current spreading uniformity, the MQW structure and IQE and lower forward voltage.
