Articles

Correcting Problems with HPS Lamps

Publication: 

GPN

Author: 

Erik Runkle and Bruce Bugbee

High-pressure sodium lamps are widely used in greenhouse production, but they require maintenance for peak efficiency. After visual inspection, many growers find that some lamps in their greenhouse either aren’t operating or aren’t doing so at full brightness.

The Future of Greenhouse Lighting

Publication: 

GPN

Author: 

Erik Runkle

The high-pressure sodium lamp is the most widely used light source for supplemental lighting in greenhouses. On a relative basis, it is moderately efficient, has a long bulb life and emits light that is rich in orange and deficient in blue and red.

Supplemental Lighting Guidelines for Young Plants

Publication: 

GPN

Author: 

Erik Runkle

The R to FR Ratio

Publication: 

Greenhouse Product News May 2011

Author: 

Erik Runkle

Bright Ideas in the Works

Publication: 

Greenhouse Product News February 2010

Author: 

Erik Runkle and Ryan Warner