ACADEMIC SEARCH: SCIENCE - BIOLOGY - HORTICULTURE -- BIOLOGICAL REGENERATION -- FOOD TECHNOLOGY -- GROWTH TECHNOLOGY

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Dr. Novita Singh B.Sci (Hons) MSc PhD (USyd)

University of Technology Sydney

Significant reduction in energy for plant-growth lighting in space using targeted LED lighting and spectral manipulation

ABSTRACT: Bio-regenerative life-support systems will be necessary to sustain long-duration crewed missions at distant space destinations. Since sufficient sunlight will not always be available for plant growth at many space destinations, efficient electric-lighting solutions are greatly needed. The present study demonstrated that targeted plant lighting with light-emitting diodes (LEDs) and optimising spectral parameters for close-canopy overhead LED lighting allowed the model crop leaf lettuce to be grown using significantly less electrical energy than using traditional electric-lighting sources. An energy-conversion efficiency of less than 1 kWh/g dry biomass is possible using targeted close-canopy LED lighting with spectral optimisation.