CINCINNATI--(BUSINESS WIRE)--LSI Industries Inc. (Nasdaq: LYTS, “LSI” or the “Company”), a leading U.S. based manufacturer of commercial lighting and display solutions, today announced that it has entered into a definitive agreement to acquire privately held Royston Group (“Royston”), a leader in identity and equipment solutions for retail environments, from Industrial Opportunity Partners (“IOP”) for an aggregate purchase price of $325 million, subject to a working capital adjustment, with $32.