 SOLON, Ohio--BUSINESS WIRE--Energy Focus, Inc. NASDAQ: EFOI, a leader in sustainable and human-centric lighting technologies, today announced that it will be presenting at the 13th annual LD Micro Main Event investor conference on Tuesday, December 15th at 1 p.m. EST. James Tu, Chairman CEO of Energy Focus, will be presenting to a live virtual audience. Register here for the event: ve.mysequire.com The Main Event will feature a new and unique format, with companies presenting for 10 