Lighting
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 »
Bedding Plants with High Base Temperatures
In the late winter and spring, many greenhouse growers produce a wide variety of species and cultivars, many of which are annual bedding plants. Crops can have different growing and flowering requirements, so plants shouldn’t... more »
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