Once an elite lacrosse player, David Morrow took what he learned at Warrior Sports and built Lume into the biggest cannabis company in Michigan, with a plan to go national. “They’re not ready for this knife fight.”

David Morrow gets out a minivan parked outside of Lumes sprawling 225,000-square-foot facility in Evart, Michigan and walks through the front door and puts on a Tyvek jumpsuit and booties. He then st…