Rotating High-pressure Sodium Lamps (image) American Society for Horticultural Science Share Print E-Mail Caption Rotating lamps at Wenke Greenhouses in Kalamazoo, Mich., induce early flowering of bedding plants. Credit Photo by Ron Godden. Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.