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


  • 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.

  • 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.

  • 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.

  • Is green light useful to plants?

    Published on June 17, 2019
    There is some confusion about the efficacy of green light at promoting photosynthesis. This article explains why and how green light is useful to plants.

  • 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.

  • DLI 'requirements'

    Published on May 10, 2019
    This article provides daily light integral (DLI) guidelines to produce plants of at least moderate quality, assuming plants are grown at moderate temperatures.

  • 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.

  • 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.

  • 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.

  • Growing ornamental seedlings under white LEDs

    Published on November 15, 2018
    Michigan State University researchers discuss the impacts of using white light on plant growth and human vision, as well as energy considerations when growing ornamental seedlings indoors.

  • 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.

  • 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.

  • 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.

  • Investment considerations for greenhouse lighting

    Published on October 11, 2017
    Many growers install and operate supplemental (photosynthetic) lighting to increase crop quality and yield. This article describes some of the factors to consider when investing in a supplemental lighting system for greenhouse crop production.

  • 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.

  • 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.

  • 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.

  • Supplemental and sole source LED lighting

    Published on August 9, 2017
    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.

  • 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.

  • 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.