October 27, 2014

Enhance Greenhouse Production With Diffuse Light

Greenhouse coverings that provide diffuse light can increase quality and productivity in the greenhouse.

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June 10, 2014

Michigan State University To Hold Discussion On Lighting Standards For LEDs

Industry members are invited to attend a July 28 meeting to discuss horticultural lighting standards for light-emitting diodes (LEDs), facilitated by Michigan State University (MSU). The two-hour roundtable discussion will take place during the American Society for Horticultural Science (ASHS) annual meeting in Orlando, Fla.

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April 30, 2014

Conviron Partners With Valoya To Extend LEDS Into New Markets

Canada-based Conviron and Valoya of Finland recently announced an agreement for the distribution and integration of Valoya LEDs into Conviron growth chambers and rooms. Conviron is now the exclusive distributor of Valoya's products to seed and biotech companies, government institutions and universities in North America, India, Australia and Brazil.

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The GGS open-roof greenhouse design provides an optimal system to both maximize ventilation while maintaining a smooth surface on the poly and good roof pitch for condensation control.

April 29, 2014

Illumitex And GGS Partner To Provide Complete Growing Solutions In Horticulture

The strategic alliance between the two companies will provide complete growing solutions to all horticulture markets including vegetable, flower and medicinal cannabis in both greenhouse and controlled environment agriculture applications.

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Netherlands’ Wageningen UR Greenhouse Horticulture Study shows using diffuse light results in 25 percent growth rate increase

February 12, 2014

Diffuse Light Results In 25 Percent Growth Rate Increase, Wageningen UR Study Shows

Anthurium plants produced in light-diffused greenhouses equipped with Svensson’s Harmony screens were ready for sale at 16 weeks compared to the normal 22 weeks.

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December 30, 2013

MSU Researches Growing Seedlings Under LEDs

In part one of a two-part series, Michigan State University researchers share their findings in germinating seedlings with LED lights.

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October 7, 2013

LEDs Could Eventually Manipulate Scent, Color In Ornamentals And Edibles

With the ability to deliver specific light wavelengths with LED lights, growers, retailers and consumers could eventually manipulate the scent, color, flavor, postharvest life and other characteristics of ornamental and edible crops.

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September 17, 2013

LEDs Reduce Costs For Greenhouse Tomato Growers According To Purdue Study

Tomatoes grown around LED lights in the winter can significantly reduce greenhouse energy costs without sacrificing yield, according to a Purdue University study. Cary Mitchell, a professor of horticulture, said the average tomato is shipped about 1,500 miles from warmer climates where they’re grown to cooler climates that cannot produce the fruit cost-effectively in the winter. That journey is costly, however, because tomatoes are picked green and ripen during shipping, decreasing quality and flavor. The lengthy shipping distance also adds to the industry’s carbon footprint. “It makes it really hard for the greenhouse industry to grow tomatoes well in the offseason. We’re trying to change that and make it affordable,” Mitchell said. Energy costs drive up prices for producers who might want to grow tomatoes in greenhouses in states that have winters inhospitable to growing food. Greenhouses must be heated, and shorter, overcast days require costly lighting. Mitchell and doctoral […]

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September 13, 2013

Propagation With LED Lighting

Integrated Botanics, a young plant producer serving Seville Farms, is making use of versatile LED lighting options in its new germination room to improve propagation.

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September 13, 2013

Comparing LED Lighting To High-Pressure Sodium Lamps

Cuttings of vegetatively propagated bedding plants are frequently rooted in late winter and early spring to meet the spring and early summer market demand for flowering bedding plants. However, this is also the time when dirty and old glazing material, interior superstructures, and hanging baskets suspended above benches reduce already seasonally low ambient outdoor daily light integrals (DLIs) inside the greenhouse. Increasing the DLI during propagation has been shown to improve growth and quality of rooted cuttings, as well as reduce time to flower after transplanting. While maintaining clean glazing material, minimizing superstructure and reducing the density of hanging baskets may increase greenhouse DLI, the only way to appreciably increase DLI is to provide supplemental or photosynthetic lighting. Light-emitting diodes (LEDs) are solid-state, semi-conducting diodes that can emit light from ~250 nm to ≥1000 nm. There are several features of LEDs that make them attractive alternatives to high-pressure sodium (HPS) […]

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April 22, 2013

Diffuse Lighting Offers Multiple Benefits

Growers are increasingly learning that steering the greenhouse climate, which includes the related factors of light levels, temperature and humidity, can yield big gains in terms of plant quality and productivity as well as economic efficiency in heating and cooling expenses. Researchers, meanwhile, have been demonstrating that diffuse light plays an important role in achieving those goals. Materials have been developed to diffuse direct solar radiation, and use of diffuse light begins with an understanding of light and its behavior. Solar RadiationSolar radiation passes through the top of the atmosphere essentially unchanged by its passage through space. As it moves, it interacts with gas molecules, water droplets and aerosols and is gradually absorbed into the atmosphere. Radiant energy is converted into internal energy. It ceases to exist as radiant energy and heats the atmosphere directly. Very little of this absorption happens in visible wavelengths. Rather, ozone absorbs most of the […]

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