Separate tags by commas.



  • 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.

  • Do you know what your DLI is?

    Published on December 24, 2006

  • Maximize the benefits of supplemental lighting

    Published on January 8, 2018
    Purchasing, installing, and operating supplemental greenhouse lighting is fairly expensive. Here are some tips and considerations to maximize your supplemental lighting system.

  • Rapid flowering of pansy

    Published on March 22, 2010
    Pansy has a unique photoperiodic flowering response. What can be done when varieties don’t flower uniformly or on time?

  • 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.

  • 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.

  • Efficacy of lamp types at controlling flowering

    Published on February 23, 2016
    This article summarizes the effectiveness of low-intensity lighting from different lamp types at regulating flowering of a wide range of ornamental crops based primarily on research performed at Michigan State University.

  • Greenhouse shading options

    Published on March 24, 2008

  • 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.

  • Replacing incandescent lamps

    Published on August 23, 2012
    Incandescent lamps can at least partly be replaced by compact fluorescent bulbs and/or LEDs without losing the ability to control flowering of ornamentals grown in 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.

  • Light quality defined

    Published on June 24, 2007

  • What is your photoperiod?

    Published on September 24, 2008

  • Manipulating light in the greenhouse

    Published on June 24, 2009

  • 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.

  • Red light and plant growth

    Published on August 7, 2016
    Many LED fixtures developed for plant growth applications emit a large proportion of red light. Learn about the roles of red light in photosynthesis, extension growth, and flowering, as well as human perception.

  • Tips for using light sensors

    Published on January 24, 2009

  • Control flowering with LEDs

    Published on March 23, 2014
    Is it worth paying extra for LEDs? Researchers at Michigan State University found that the long-term benefits may outweigh the up-front costs.

  • 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.

  • 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.