Lighting

Lighting Plans: Their Generation and Importance

Whether for a commercial greenhouse or an indoor growing facility, light intensity and uniformity are critical to successful production of plants. Light sources should be positioned based on several parameters including their output characteristics and... more »

Duets: Supplemental and Sole Source LED Lighting

Joining me today is Erik Runkle, professor at Michigan State University. Erik is well known in this magazine for his “Technically Speaking” column appearing inside the back cover. Peter: Erik, before starting I’d like to... more »

Plant Lighting Efficiency and Efficacy: μmols per joule

Plant lighting continues to be a hot topic, especially as light-emitting diode (LED) technology continues to advance. Growers commonly ask which type of lighting technology to purchase. Supplemental lighting using LEDs is usually more efficient,... more »

Growing Plants with Green Light

Green light can be defined as radiation with wavelengths between 500 and 600 nm. Green light is within the photosynthetically active waveband of 400 to 700 nm, yet its effects on plant growth and development... more »

Growing Better CEA Crops with Smart Lighting Choices

Lighting plays an important role for both ornamental growers and controlled environment agriculture (CEA) growers. For ornamental crops, photoperiodic lighting controls flowering, while supplemental lighting increases light intensity to reduce crop time and improve crop... more »

Asclepias tuberosa Butterfly Weed

Several species of milkweed, or asclepias, are native to North America, and this year the Perennial Plant Association has chosen one of them as Perennial Plant of the Year: Asclepias tuberosa. This species, commonly known... more »

Effects of Blue Light on Plants

Blue light is usually referred to as radiation with wavelengths between 400 and 500 nm. This waveband is within the visible spectrum, has relatively high energy, and has pronounced effects on plant growth and flowering.... more »

The Importance of Light Uniformity

Managing light is obviously critical to the production of crops grown in controlled environments. When considering the different dimensions of light, we usually focus on photoperiod (day length), light quantity (intensity) and light quality (the... more »

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GPN recognizes 40 industry professionals under the age of 40 who are helping to determine the future of the horticulture industry. These individuals are today’s movers and shakers who are already setting the pace for tomorrow.

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May 2019 GPN
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