(4-traders.com) TULSA, Okla., Aug. 23, 2016 /PRNewswire/ -- The Horticultural Lighting Conference, presented by LEDs Magazine and owned by PennWell Corporation, announced today an impressive speaker lineup for the inaugural event to be held October 12, 2016 at the Palmer House Hilton Hotel in downtown Chicago,...http://www.4-traders.com/news/Horticultural-Lighting-Conference-Announces-Impressive-Speaker-Lineup--22944655/