Dwight Stewart, founder of an LED lighting technology company called Igor, will be the guest speaker at the Business Innovation Zone luncheon on June 18. Stewart will share his entrepreneurial experiences to try to help attendees learn how to validate ideas and the importance of surrounding yourself with good advisers. The event starts at 11:30 a.m. at StartupCity Des Moines, 317 Sixth Ave. Admission is $15, which includes lunch; to register, click here