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Showing results for content tagged 'greenhouse light management'. Search instead for the keyword 'greenhouse light management'.


  • Evaluating greenhouse supplemental lighting

    Published on November 17, 2016
    Researchers at Purdue and Michigan State University compare young and finished plant production under LED toplighting and HPS lamps to determine which source is most effective.

  • The economics of lighting young plants indoors

    Published on June 12, 2019
    This article provides the framework of the economics of indoor lighting of young plants (transplants). It includes example costs for an indoor plant factory in Japan, and provides highlights for indoor lighting used by two commercial growers in the U.S.

  • LEDs: Far red & light intensity interaction

    Published on March 4, 2019
    Part 2 of a 5-part series explains how far-red light and light intensity (the photosynthetic photon flux density) interact to influence growth of young plants indoors, under fully controlled environments.

  • Growing plants with green light

    Published on June 7, 2017
    Green light can be defined as radiation with wavelength between 500 and 600 nanometers. Green light is within the photosynthetically active waveband of 400 to 700 nm, yet its effects on plant growth and development are not well understood.

  • Sole-source lighting of plants

    Published on September 13, 2017
    Sole-source lighting is a term used to describe the deliver of light to plants that do not also receive light from the sun. In other words, electric lighting is delivered indoors and provides the sole source of light for plant growth and development.

  • Green and blue LED lighting

    Published on March 6, 2019
    Indoor production of leafy greens, Part 2 of 4: How green light affects lettuce growth can depend on blue and red light.

  • An overview of long-day lighting

    Published on July 17, 2019
    There are a lot of factors to consider for effective and efficient long-day lighting. This article provides a brief overview of when and how to deliver lighting to create long days inside greenhouses.

  • Effects of blue light on plants

    Published on February 2, 2017
    Blue light is usually referred to as radiation with wavelengths between 400 and 500 nanometers. This waveband is within the visible spectrum, has relatively high energy, and has pronounced effects on plant growth and flowering.

  • Lighting young plants indoors

    Published on February 4, 2019
    Part 1 of a 5-part series is an introduction to producing young plants indoors under fully controlled environments.

  • Lighting plans: Their generation and importance

    Published on August 17, 2017
    Light intensity and uniformity are critical to successful production of plants. This article describes how lighting plans are developed, and why they are so important when comparing lighting technologies.

  • What is the ideal lighting spectrum?

    Published on March 16, 2020
    With LEDs, we can tailor the light spectrum to elicit specific growth responses. This article discusses some of the considerations to identify an “ideal” plant lighting spectrum. As you will read, it’s highly situational.

  • Developing new plant lighting standards

    Published on October 23, 2017
    Standards are developed so there is consistency and conformity in products to improve confidence and comparability in new technologies.

  • UV radiation and applications in horticulture

    Published on May 1, 2018
    Ultraviolet (UV) radiation is outside of the photosynthetically active waveband, but it is biologically active and regulates plant growth.

  • White LEDs for plant applications

    Published on November 12, 2018
    Many horticultural lighting fixtures combine blue and red LEDs. However, there are merits to using fixtures that partly or completely contain white LEDs.

  • Red light spectrum - Role of far red radiation

    Published on November 9, 2016
    What are the potential benefits for including far-red radiation when growing seedlings indoors?

  • The importance of light uniformity

    Published on March 3, 2017
    Managing light is obviously critical to the production of crops grown in controlled environments. When considering the different dimensions of light, we often overlook the importance of light uniformity.

  • Plant lighting efficiency and efficacy

    Published on July 10, 2017
    Plant lighting continues to be a hot topic, especially as light-emitting diode (LED) technology continues to advance. Learn more about how electric lamps convert electricity into photons of light useful to plants.

  • Far red is the new red

    Published on February 6, 2017
    Adding far red to red and blue light from LEDs brings control of plant growth to the next level.

  • How much supplemental lighting do you need?

    Published on December 17, 2019
    Several factors need to be considered when choosing a supplemental lighting system, and arguably the most important one is to determine what light intensity you want to deliver. This article provides steps on how to do that.

  • Supplemental greenhouse lighting: LED or HPS?

    Published on September 20, 2017
    Researchers at Michigan State University see if the results from producing high-quality seedlings with LEDs justify the higher capital outlay for installation.