To provide a solar radiation device having the capability of emitting radiation energy having a characteristic approximate to sunlight by obtaining radiation energy within the visible ray zone of sunlight from a metal halide lamp, and obtaining radiation energy approximate to the spectral distribution of the infrared ray zone from a tungsten halogen lamp.
A solar radiation device 1 is formed to be movable up and down, and right and left on the operation of a drive device 2. Furthermore, a lighting system 4 is formed out of a plurality of metal halide lamps 5 and tungsten halogen lamps. In this case. the device 1 can be controlled so that a ratio of radiation energy in a visible ray zone to radiation energy in a infrared ray zone emitted from the device 4 is within ±10% for a ratio of Pv/Pi=0.8, provided that Pv is radiation energy in the visible ray zone (wavelength equal to or above 400nm and less than 800nm) of sunlight, and Pi is radiation energy in the infrared ray zone (wavelength between 800nm and 2,500nm).
TOMITA KYOICHI
OKADA SHIGERU
TOSHIBA LIGHTING & TECHNOLOGY