Efficacy of Two HORTILED Fixtures

Authors

Jakob Johnson, Utah State University
Paul Kusuma, Utah State UniversityFollow
Bruce Bugbee, Utah State UniversityFollow

Document Type

Report

Journal/Book Title/Conference

Crop Physiology Laboratory

Publisher

Utah State University

Publication Date

12-2017

First Page

1

Last Page

1

Abstract

We tested the efficacy of the Full Spectrum and Red-Blue HORTILED TOP LED fixtures manufactured by PL Light. Both fixtures had an 80° light distribution.

The efficacy of the fixtures was measured using flat plane integration as described by Nelson and Bugbee (2014)¹ (see adjacent photo). The fixtures were suspended at 0.65 m above the floor in a 3 × 3 m room with flat black walls. The photosynthetic photon flux density (PPFD, μmol · m^-2 · s^-1) was measured with a recently calibrated quantum sensor (LI-COR model 190R). Measurements were made 2.5 cm apart near the center, increasing to 10 cm near the edge, and extrapolated to infinity using an exponential decay function.

Recommended Citation

Johnson, Jakob; Kusuma, Paul; and Bugbee, Bruce, "Efficacy of Two HORTILED Fixtures" (2017). Controlled Environments. Paper 11.
https://digitalcommons.usu.edu/cpl_env/11