This comprehensive presentation includes all basics of selecting LED lighting for plant production and the update of recent light quality research at the Runkle Lab at MSU, discussing how lettuce crop responds to blue, green and far-red which affect morphological extension growth. Indoor Ag Science Café is an outreach program of a project OptimIA, funded by USDA SCRI grant program (http://www.scri-optimia.org). The café forums are designed to serve as precompetitive communication platform among scientists and indoor farming professionals. The Café presentations are available from YouTube channel:https://www.youtube.com/playlist?list=PLjwIeYlKrzH_uppaf2SwMIg4JyGb7LRXC Contact Chieri Kubota at the Ohio State University (Kubota.10@osu.edu) to be a Café member to participate.