Ralph C. Tuttle
Ralph Tuttle is the applications engineering manager at Cree, Inc. in Durham, NC. He has been with Cree for 23 years. Prior to managing applications engineering, he held various engineering, development, and management positions in the Materials, Optoelectronics, and Components groups at Cree. Tuttle managed Cree’s wafer fab and was then involved in the original development of Cree’s XLamp product family. He is active within NEMA, IESNA, ANSI, and is a US “LED Expert” representative to the IEC. He was co-author of IESNA LM-80 (Measuring LED Lumen Maintenance), was the technical coordinator of the IESNA TM-21 (Projecting LED Lumen Maintenance) Working Group, and is currently the technical coordinator of the IESNA TM-35 (Projecting LED Chromaticity Shift) Working Group. Tuttle has BS and MBA degrees and, prior to joining Cree, worked in the semiconductor industry for 20 years.