Dr. Eric Bretschneider, CTO of QuarkStar, has over 25 years of experience developing LED technologies and products for lighting applications. He is a noted expert in LED chip/package/fixture design, phosphor conversions, LED measurement/reliability, and IP. Inside the IES, Dr. Bretschneider is the current chair of the Solid-State Lighting Subcommittee and a member of the Science Advisory Panel. He was the technical coordinator for IES TM-21-19, as well as the developer of the methodology used for IES TM-35-20 (Predicting Chromaticity Shift). Dr Bretschneider is also a member of the MRS, SPIE and OSA and holds over 30 US patents related to LED technologies and optical design.