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LED Symposium

February 19-20, 2015
The University of Arizona - CEAC
Tucson, AZ

This symposium is organized by the University of Arizona Controlled Environment Agriculture Center (CEAC) in conjunction with the USDA SCRI (Specialty Crop Research Initiative) LED project members from Purdue University, University of Arizona, Michigan State University, Rutgers University and industry partner Orbitec. The symposium will provide SCRI LED project members and other nationally recognized research groups the opportunity to bring the latest information, understanding, and assessments of the use of LEDs in horticulture through oral presentations

Three major topics covered in this symposium will be:
1. Plant responses under sole-source LED lighting,
2. Plant responses under supplemental (high intensity) or photoperiodic (low intensity) LED lighting in greenhouses, and
3. LED technology development, evaluation, and economics.


     Thursday, February 19th, 2015
     3:00pm to 7:30pm: Facility tour & reception

     Friday, February 20th, 2015
     8:00am to 5:00pm: One day LED symposium
     Download the program (Updated Feb. 14, 2015)


All activities (except reception) will take place at the University of Arizona Controlled Environment Agriculture Center: 1951 E. Roger Rd., Tucson, AZ 85719. CEAC Map & Directions


  1. Toward an optimal spectral quality for plant growth and development: Interactions among species and photon flux by Bruce Bugbee, Utah St. Univ.
  2. Using LEDs to regulate flowering of photoperiodic crops by Erik Runkle, Michigan St. Univ.
  3. Can we increase the production efficiency of an indeterminate high-wire tomato crop with LED intracanopy supplemental lighting? by Celina Gómez and Cary Mitchell, Purdue Univ.
  4. Greenhouse supplemental light quality for vegetable nurseries by Chieri Kubota and Ricardo Hernández, Univ. of Arizona
  5. Increasing the value of horticultural crops using LEDs by Michael Dzakovich and Cary Mitchell, Purdue Univ.
  6. Blue:Red photon flux ratios for the production of vegetable transplants by Ricardo Hernández, Univ. of Arizona
  7. Comparison of light qualities and daily light integrals for sole source lighting of bedding plant plugs and microgreens by Roberto Lopez and Joshua Craver, Purdue Univ.
  8. Tomato transplant production under sole-source LEDs by Diana Vercillo, Grafted Growers
  9. Plant production under LEDs – an overview of worldwide applications by Ron DeKok, Philips Lighting
  10. LED economics, consumer issues and life impact assessment by John Burr, Purdue Univ.
    1. LED cost comparison tool (Excel file) by John Burr, Purdue Univ.
  11. Measuring LED lamps for horticulture by A.J. Both, Rutgers Univ.
  12. LED technology development by Robert Morrow, ORBITEC
  13. Advanced LED technology and photobiology – much more than energy savings by Titta Kotilainen, Valoya

We thank Chieri Kubota, Ricardo Hernández, and their colleagues at the University of Arizona for hosting this symposium.