Play Live Radio
Next Up:
0:00
0:00
0:00 0:00
Available On Air Stations
Our classical and Spanish-language HD channels are currently down and undergoing repair. They are still available to stream online.

Research Shines Light On Gardening Question

epa.org

Though the sun is still the primary source of light for most gardeners, many rely on electric lights some of the time. But varying claims on the efficiency of these lights from different manufacturers has left many growers confused about which products to use, according to Bruce Bugbee.

Bugbee, a professor in Utah State University’s College of Agriculture and Applied Sciences, along with graduate student Jacob Nelson decided to look into these claims, publishing an article on the topic in the journal PLOS ONE.

They compared 22 different kinds of lights, including  LEDs, fluorescents, ceramic metal halides and high pressure sodium fixtures, the kind of lights used in street lamps.

“The very best technologies were high pressure sodium lights and LEDS are also excellent, except they are really expensive,” Bugbee said.

He said the research showed LEDs cost 5 to 10 times as much money per unit of light compared to the high pressure sodium lights, mostly due to replacement costs.

Coming in last for efficiency were florescent lights, said Bugbee.

Overall, the type of light a grower should use depends on how their greenhouse is set up. Bugbee explained the high pressure sodium lights shine light over a broad area, whereas LEDs are more like tiny, directed spotlights.

“For big growers, I think the high pressure sodium lamps are still the best technology, the LEDs need to come down in price before they are the best technology,” Bugbee said. “But, for home owners it’s a different story.”

He said if home gardeners have a small greenhouse, LEDS can be the best choice. 

After graduating with a B.S. in Anthropology from the University of Utah, Elaine developed a love of radio while working long hours in remote parts of Utah as an archaeological field technician. She eventually started interning for the radio show Science Questions and fell completely in love with the medium. Elaine is currently taking classes at Utah State University in preparation for medical school applications. She is a host of UPR’s 5:30 Newscast and a science writer for the Utah Agricultural Experiment Station. Elaine hopes to bring her experiences living abroad in Turkey and Austria into her work.