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Showing results for content tagged 'light management in greenhouses and controlled environments'. Search instead for the keyword 'light management in greenhouses and controlled environments'.

  • Light Management in Controlled Environments

    MSU Extension’s floriculture educational and applied research programs help improve greenhouse crop production and business management by providing trusted information on new production techniques and management strategies.


  • DLC requirements for LED fixtures

    Published on December 5, 2018
    This article highlights the DesignLights Consortium's (DLC's) requirements for testing and reporting horticultural lighting fixtures that contain light-emitting diodes (LEDs).

  • Growing ornamental seedlings under different wavelengths of red light from LEDs

    Published on August 23, 2014
    Plants grew similarly under different colors of red light, so the choice of red LEDs to be used for horticultural applications could depend on factors such as LED longevity, efficacy, and cost.

  • Does light quantity trump light quality?

    Published on December 5, 2017
    Some of our recent research confirms that light quality (such as the ratio or red to far red) has a greater effect on plant growth when light intensity is low than when it is high.

  • Leafy greens: Green & far red LED lighting

    Published on February 1, 2019
    Indoor production of leafy greens, Part 1 of 4: Substituting green or far-red light for blue light can increase lettuce and kale yields.

  • UV-transmitting greenhouse glazing

    Published on June 16, 2020
    Most greenhouse glazing plastics absorb UV radiation to enhance their longevity. However, plants grown under glazing that transmits UV are typically more compact, darker in color, and more resilient.

  • Managing light pollution

    Published on August 9, 2019
    While electric lighting is increasingly used in greenhouses to increase plant growth, yield, and quality, it can have unintended consequences to neighboring areas at night.

  • Providing long-days with CFLs

    Published on March 24, 2009
    Answering the question of can compact fluorescent lamps save energy and still light your crops adequately?

  • Light wavebands & their effects on plants

    Published on March 23, 2015
    This article discusses how the four primary wavebands of light (blue, green, red, and far red) influence plant growth and development. Light wavebands also interact with each other, but only a few are mentioned here.

  • Replacing incandescents with LEDs

    Published on November 23, 2014
    LED lamps developed to regulate flowering are considerably more expensive than incandescent or compact fluorescent bulbs, but they last much longer, consume less energy, and are at least effective.

  • Which light sensor should I use?

    Published on September 23, 2012
    This article focuses on the different units of instantaneous light intensity and how each is measured.

  • LEDs: Blue & far-red light

    Published on April 10, 2019
    Part 3 of a 5-part series summarizes results from an indoor lighting experiment with floriculture crop seedlings, where we determined whether blue light could nullify the effects of far red on stem elongation, without inhibiting flowering.

  • 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.

  • A little far-red light goes a long way

    Published on May 3, 2019
    Part 4 of a 5-part series presents information on how a relatively low intensity of far-red light influences seedlings grown in fully controlled, indoor environments.

  • 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.

  • Photoperiodic vs. photosynthetic lighting

    Published on September 23, 2015
    There is sometimes confusion about photoperiodic lighting (to regulate flowering) and photosynthetic lighting (to increase plant growth) in greenhouses. This article differentiates these two lighting applications.

  • Grower 101: Controlling photoperiod

    Published on October 24, 2002
    Since many important “cash” crops are photoperiodic, a basic knowledge of manipulating daylength is essential.

  • The economic viability of LED lighting

    Published on October 7, 2016
    Determine whether LED lighting is right for your operation by considering seven important factors that impact return on investment.

  • Daily light integral & flowering of annuals

    Published on November 23, 2010
    The daily light integral can influence crop timing and quality characteristics including branching, flower number, and flower size. This article presents research-based information on how light quantity influences production of annual bedding plants.

  • Growing seedlings under LEDs, part 2

    Published on February 23, 2014
    In the second part of a two-part series, Michigan State University researchers share their findings in germinating seedlings indoors under LED lights.