Abstract
Growth experiments of Sprouting Radish were carried out for the first time by using a red laser diode (LD) and two blue light emitting diodes (LED) as the light source for the photosynthesis. The output power and the central wavelength of the LD are 5 mW and 670 nm, and those of the LED are 1.2 mW and 450 nm, respectively. The type of the LD is selected so that the central wavelength of the LD matches to the band center of the absorption spectrum of the plant. It is found that the plant under the artificial light grows similarly to that under sunlight.
