Lighting Units Conversion Calculator, by Environmental Growth Chambers. The calculator is used to convert between different lighting units and lamp types, using data from the Plant Growth Chamber Handbook, 1997.
Trial Before Error, by Matthew J. Grassi, Greenhouse Management, 2020. “Testing different lighting setups in your greenhouse has its advantages, but there are also some factors to be aware of in order to ensure accurate data collection and observations.”
Making Sense of Light Sensors, by Roberto G. Lopez and Erik S. Runkle, Greenhouse Production News, 2021. “Learning to convert radiation data from your environmental computer into daily light integral.”
To LED or Not to LED, American Floral Endowment, 2019. Dr. Erik Runkle outlines a five-part series that he wrote with colleagues for GrowerTalks magazine. The five articles discuss LED lighting impacts on plant growth and the economics of LED lighting when growing indoor plants.
Embracing a New Understanding of PAR. “Research at Utah State University is transforming our understanding of photosynthesis and light”, by Jolene Hansen. Greenhouse Management, November 2019.
Q&A: Making Way for the Sun. Dr. Marc van Iersel discusses light dimming research. Interview by Patrick Williams. Greenhouse Management, November 2019.
DLI ‘Requirements’. technically speaking by Erik Runkle, May 2019. Greenhouse Production News (GPN):50. This article outlines the factors that play into determining DLI requirements.
A Little Far-Red Light Goes a Long Way. Mengzi Zhang, Yujin Park & Erik Runkle, May 2019. Grower Talks, vol.83, no.1:58-61. This article looks at the pros and cons of using far-red light.
LEDs: Blue & Far-Red Light. Yujin Park, Erik Runkle, April 2019. Grower Talks, vo.82, no.12:58-60. How do blue and far-red light affect the quality of ornamental seedlings?
Growing Ornamental Seedlings Under White LEDs. Yujin Park, Erik Runkle, November 2018. Greenhouse Grower:23-26.
Indoor Grow Rooms Can Improve the Success of Young Plant Propagation. David Kuack, July 2019. Greenhouse Production News (GPN):32-34. “Indoor grow rooms equipped with LEDs can produce consistent young transplants, making it easier for growers to plan their planting schedules and delivery orders.”
Horticulture’s History with Disruptive Technology: LED Lighting Takes Its Turn. duets by Peter Konjoian and Alex Bodell, June 2019. Greenhouse Production News (GPN):16-18. A conversation about the role of LED lighting in horticulture.
Selecting an LED Fixture. technically speaking by Erik Runkle, February 2019. Greenhouse Production News (GPN):42. This article outlines considerations for choosing LED fixtures.
How to Properly Estimate Lighting Costs. Chris Manning, September 2020. Greenhouse Management. “Estimating lighting costs, and knowing how much light to use, are key to turning a profit when using supplemental lighting.”
Crops Suitable for Vertical Farming. technically speaking by Erik Runkle, June 2019. Greenhouse Production News (GPN):42. This article outlines why certain crops may be well suited for vertical farming applications.
The Economics of Lighting Young Plants Indoors. Paul R. Fisher, Celina Gómez, Megh Poudel & Erik Runkle, June 2019. Grower Talks, vol.83, no.2:50-52. How to evaluate costs and profitability of growing transplant indoors.
Is Green Light Useful to Plants? technically speaking by Erik Runkle, June 2019. Greenhouse Production News (GPN):50. This article debunks the myth that green light is not useful for photosynthesis.
The Physiology of Photosynthesis: Implications for Supplemental Lighting. American Floral Endowment article by Marc van Iersel. March 2020. “To develop to most cost-effective lighting methods possible, we decided to start with the basics: quantify how efficiently different crops can use light and use that knowledge to develop smarter lighting strategies. In this article, we will focus on perennials. There are of course many species of perennial plants, so we decided to focus on 10 popular species.”
Horticulture Light Metrics, Fluence Bioengineering, Inc.
Defining Lighting Terms, Hort Americas.
PAR, PPF, PPFD, and PFD Explained, “Dr Bruce Bugbee explains the differences and evolution of the terms PAR (photosynthetically active radiation), PPF (Photosynthetic Photon Flux), PPFD (Photosynthetic Photon Flux Density), and PFD (Photon Flux Density).”