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http://dx.doi.org/10.5762/KAIS.2021.22.3.333

A Study on the Lighting and the Photosynthetic Photon Flux Density with LED for Light Reinforcement  

Lee, Boong-Joo (Department of Electronic Engineering, Namseoul University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.3, 2021 , pp. 333-338 More about this Journal
Abstract
This study determined the characteristics of LED illumination and photosynthetically active radiation flux density (PPFD) for LED lighting design in an indoor plant factory. This was done based on the light wavelength and PPFD intensity required for plant growth. It has been found that the wavelength and intensity are decreased according to the measuring distance, and green light has an important role in illumination characteristics, while blue light has an important role in the PPFD characteristics. Considering only the photosynthetic properties of plants, the effective order of photosynthesis was blue>red>white>green. When the measurement distance was 30 [cm], it was found that reduction levels of 60 [cm], 90 [cm], and 120 [cm] decreased to about 36 [%], 18 [%], and 10 [%], respectively. As a result of the characteristics of mixed light (red:blue=2:1, 3:1, 4:1) and the measurement distance, when the measured value at 30 [cm] is 100%, the measured value at 120 [cm] is 10-11 [%]. From the obtained results, an optimal structure was proposed for maximizing the light efficiency of an indoor greenhouse for future research.
Keywords
LED; PPFD(Photosynthetically Active Radiation Flux Density); Photosynthesis; Illumination; Greenhouse;
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Times Cited By KSCI : 1  (Citation Analysis)
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