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LEDs for Extraterrestrial Agriculture: Tradeoffs between Color Perception and Photon EfficacyGrowing food on extraterrestrial surfaces requires the development of efficient lighting technologies to provide photons for photosynthesis. Here we discuss the development and demonstration of LED panels with a high color fidelity index that can achieve a photon efficacy of 3.6 µmol of photons per joule of input electrical energy. As of June 2021, this is higher than commercial LED fixtures on Earth. This high efficacy makes LED technology a preferred option to solar fiber optics for extraterrestrial applications. Increasing the fraction of red LEDs and photons increases the efficacy but decreases the perception of color.
Document ID
20210016720
Document Type
Technical Memorandum (TM)
Authors
Paul Kusuma (Utah State University Logan, Utah, United States)
Brendan Fatzinger (Utah State University Logan, Utah, United States)
Bruce Bugbee (Utah State University Logan, Utah, United States)
Wouter Soer (Lumileds Inc. )
Raymond Wheeler (Kennedy Space Center Merritt Island, Florida, United States)
Date Acquired
June 1, 2021
Publication Date
June 1, 2021
Subject Category
Life Sciences (General)
Funding Number(s)
WBS: 920121.01.01.66
CONTRACT_GRANT: NNX17AJ31G
CONTRACT_GRANT: USDA-NIFA-SCRI 2018-51181-28365
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
Technical Review
NASA Technical Management
Keywords
Bioregenerative
Life Support
Crop

Available Downloads

NameType NASA TM 2021 0016720.pdf STI