| 摘要 |
A lighting device according to this invention includes: a discharge lamp having an arc length of 3 mm or less; a reflector reflecting light emitted from the discharge lamp in a predetermined direction; and a reflecting device having a reflecting plate for reflecting the light reflected by the reflector toward a subject to be illuminated, the reflecting device being placed apart from the discharge lamp, the reflecting plate has an antifouling layer including a photocatalyst.
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