Canada Lights the Way to Advances in the Cultivation of Food and Flowers

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Canadian Scientists Use Light to Control Plant Growth; Growers Adopt Proven LumiGrow Technology 

LumiGrow, Inc., the leader in greenhouse spectrum control systems, expands its Canadian customer base, and partners with Canadian scientists to study the effects of light on plant growth. A team of scientists led by Dr. Youbin Zheng at the University of Guelph in Guelph, Ontario recently released the results of a study that showed that plants grown under LumiGrow LEDs produced 16 percent more marketable flowers than those grown under conventional high pressure sodium (HPS) lighting.

The efforts to discover the full possibilities LED lighting technology offers don’t stop there. The team at Guelph will soon embark on another study to find out which combination of red, blue and white LEDs maximize crop performance even further. LumiGrow will also partner on another study set to begin soon at the Greenhouse and Processing Crops Research Centre (GPCRC) in Harrow, Ontario. The study will be conducted by Shalin Khosla, Greenhouse Vegetable Specialist at the GPCRC, and will be run in parallel with commercial production greenhouses to identify optimal light schedules for major tomato growers in Ontario and throughout North America.

“We use LumiGrow lighting technology to help our customers achieve the best results for their crops by dynamically manipulating the spectrum based on each grower’s needs,” said Kevin Wells, LumiGrow CEO. “The work our Canadian research partners are doing to improve crop quality and rigor, to lengthen stems and shelf life, and to improve taste and nutritional content is transformative to our Canadian customers and greenhouse growers around the world.”

Dr. Zheng, Associate Professor and Environmental Horticulture Chair at the University of Guelph, along with researchers David Llewellyn and Katie Vinson, designed a trial to evaluate LED technology’s effectiveness when used as supplemental lighting during the darker months of the year. The trial, conducted in conjunction with LumiGrow and cut flower grower Rosa Flora from November 2013 to March 2014, focused on three different varieties of gerbera. Gerbera, the fifth most popular cut flower in the world, was selected because of its importance for North American growers and the reliance on supplemental lighting for production between November and March in northern climates. Perhaps unsurprisingly, in addition to leading to 16 percent more marketable flowers, LEDs also cut lighting energy use by 40 percent.

The University of Guelph study concluded that, “LED supplemental lighting can produce as good or better cut gerbera crops than HPS lighting, but at a substantial energy savings.”

“What we want to find out now is: what is the optimum level of supplemental LED lighting for growing cut flowers, especially during the darker months?” said Dr. Zheng. “We will study this during the upcoming 2014 -15 supplemental lighting season.”

Commercial greenhouse growers have already been harvesting the benefits of the new field of spectrum control. Major Canadian floral and produce growers, including Mans Organics, Mucci Farms and Rainbow Greenhouses have adopted the company’s spectrum control system to improve crop productivity and reduce operating costs.

About LumiGrow, Inc.
LumiGrow, Inc., the leader in spectrum control systems, empowers growers and scientists with the ability to create individual lighting solutions that improve plant growth, boost crop yields, and achieve cost-saving operational efficiencies. LumiGrow offers a range of proven third-party solutions for use in greenhouses, controlled environment agriculture and research chambers. LumiGrow solutions are eligible for energy-efficiency subsidies from utilities across North America. The company’s more than 3,000 installations in 29 countries include top global agribusinesses, many of the world’s top 100 produce and flower growers, more than 200 universities and the USDA. Headquartered in Novato, California, LumiGrow is privately owned and operated. For more information, call (800) 514-0487 or visit

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Caroline Nordahl Wells
LumiGrow, Inc.
(800) 514-0487 Ext: 102
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Kevin Lewis
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