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Low-cost Light-emitting Diode Lights Reduce Production Cost of Bibb Lettuce Grown in Aquaponic Systems
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Low-cost Light-emitting Diode Lights Reduce Production Cost of Bibb Lettuce Grown in Aquaponic Systems
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Journal Article
Low-cost Light-emitting Diode Lights Reduce Production Cost of Bibb Lettuce Grown in Aquaponic Systems
2024
Overview
In temperate climates, aquaponic producers must use artificial lighting; however, purchasing light-emitting diode (LED) grow lights can be cost-prohibitive. Two aquaponic trials evaluated low-cost LED lighting for the growth of bibb lettuce ( Lactuca sativa var. capitata ). In trial 1, seven low-cost LED lights were screened and compared with a high-end LED grow light. The three best-performing lights in terms of total plant biomass produced (grams) and total plant biomass per unit of electricity (grams per square meter per kilowatt-hour) were more intensively evaluated in trial 2. These lights included Spider Farmer SF-2000 [SPI ( $300)], Fluence RAZRx [FLU ($ 364)], Designers Fountain 6-Light 5000 K LED High Bay Light [DES ( $100)], and the control NeoSol DS [NEO ($ 1400)]. After 17 days, lettuce grown under NEO achieved higher ( P ≤ 0.05) total biomass (939 g) than DES (812 g). There were no differences ( P > 0.05) in the average individual plant weights in any treatment. Plant production efficiency (grams per square meter per kilowatt-hour) was higher in DES than NEO ( P ≤ 0.05) but was not different from SPI and FLU ( P > 0.05). Results indicate that low-cost LEDs are a viable option for producers looking to reduce investment costs while maintaining adequate plant growth. To further describe potential cost savings for producers, a partial budget analysis evaluated the net change in profits and benefit/cost ratio (BCR) of the experimental lights. All showed improved economic results compared with the control (NEO). These studies indicate that low-cost LED lights can support similar plant growth, at higher energy efficiencies, with better economic viability than more expensive grow lights.
Publisher
American Society for Horticultural Science,American Society for Horticultural Science (ASHS)
