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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.


  • Making sense of light sensors

    Published on February 10, 2021
    In this article, we discuss light sensors, light units, and how to convert light units from a greenhouse environmental control computer into more meaningful values.

  • Growing seedlings under LEDs, part 1

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

  • 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.

  • Light quality defined

    Published on June 24, 2007
    Helping growers understand the fundamental dimensions of light.

  • Problems with footcandles, lux and lumens

    Published on September 23, 2013
    The horticultural industry should discontinue use of photometric units such as lumens, lux and foot-candles. These units are based on people’s perception of light and are a highly misleading indicator of plant growth and flowering applications.

  • The future of greenhouse lighting

    Published on September 24, 2010
    This article, written in 2010, gazes into the crystal ball about how light-emitting diodes (LEDs) will become the primary lighting source for plant applications.

  • Purple vs. pink vs. white LED fixtures

    Published on September 10, 2018
    LED fixtures that emit a purplish light are usually less preferred by people, but are often the most efficient at converting electricity into light useful to plants.

  • Light it up!

    Published on July 24, 2006
    Erik Runkle talks about how to measure and maintain light for new and learning greenhouse owners.

  • Factors that influence leaf coloration

    Published on November 15, 2017
    Growers usually focus on quality attributes that relate to flowering, but this article reviews cultural and environmental factors that influence foliage color.

  • Managing light to improve rooting of cuttings

    Published on September 7, 2016
    Many growers can improve the rooting of cuttings by more closely managing light during propagation.

  • 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.

  • 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.

  • LED fixture efficacy: A 2020 update

    Published on January 13, 2020
    As we enter 2020, there are already more than 50 LED products on the Design Light Consortium's Horticultural Lighting list of qualified products. The spectrum, amount of emitted light, and efficacy vary widely among fixtures.

  • Selecting an LED fixture

    Published on February 18, 2019
    With so many LED products now on the market, choosing the right lighting fixture is a crucial decision. This article discusses factors to consider when choosing an LED fixture for plant applications.

  • LEDs: More than μmol×J–1

    Published on July 7, 2021
    Light-emitting diodes (LEDs) are known for their efficiency at converting electricity into light. While efficacy is a very important consideration, there is more to them than just their μmol×J–1.

  • “Hidden” benefits of supplemental lighting

    Published on April 7, 2021
    High light can at least partly decrease the effects of other environmental parameters on greenhouse crops. These can be considered “hidden” benefits because the effects are often not obvious.

  • Maximizing supplemental lighting

    Published on November 24, 2007
    It’s no secret that increasing the amount of daily light integral that greenhouse crops receive per day can result in higher-quality, healthier product. But do you know how to get the most value out of supplemental lighting?

  • Supplemental lighting guidelines for young plants

    Published on January 24, 2010
    Recent university research has examined how plants respond to daily light integral at different times of the year in various areas of the country.

  • 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.

  • A closer look at far-red radiation

    Published on May 7, 2016
    Far-red light can be defined as photons with wavelengths from 700 to 800 nanometers. It can promote extension growth and flowering, and at least indirectly increase growth.