Dr. Erik Runkle is a Professor and Extension Specialist in the Department of Horticulture at Michigan State University. He obtained a B.S. in Ornamental Horticulture from the University of Illinois and an M.S. and Ph.D. in Horticulture at Michigan State University. Since Erik joined the faculty in 2001, he and his graduate research team have performed numerous practical experiments in greenhouse and vertical farming environments to better understand how light, temperature, and other environmental factors control plant growth and development. Most recently, they have been focusing on how the photon spectrum regulates plant growth, flowering, yield, and quality attributes of horticultural crops, particularly ornamentals and leafy greens.
Please see : https://www.canr.msu.edu/people/dr_erik_runkle