ISHS Acta Horticulturae 418: III International Symposium on Artificial Lighting in Horticulture
UTILIZATION OF SUPER-BRIGHT LIGHT EMITTING DIODES AS AN ARTIFICIAL LIGHT SOURCE FOR PLANT GROWTH |
| Authors: | T. Yanagi, K. Okamoto |
| Keywords: | Super-bright light emitting diode, Light source, Red light, Spinach, Growth |
| Abstract:
To evaluate the possibility of super-bright light emitting diodes(SBLEDs) as a new type of artificial light source for plant growth, an extremely thin lighting apparatus (36cm long by 28cm wide by 1.66cm thick) was made by using 765 SBLEDs. The SBLEDs emitted pure red light which had a peak wavelength at 660nm and a narrow wavelength range of between 620 nm and 700 nm. The light intensity of 125 μmol/m2/s was obtained at a distance of 20cm from the SBLBDS. Five spinach plants were grown under the SBLEDS and another five were grown under 40 W special fluorescent lamps for plant growth (FLPG) at the same light intensity of 125 μmol/m2/s. The dry matter production under the SBLEDs was slightly less than that under the FLPGs. The plant leaf area under the SBLEDs was smaller than that under the FLPGs. This paper indicated that there was an important possibility of SBLEDs as a new artificial light source for plant growth. | |
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