| http://www.w3.org/ns/prov#value | - Referring to FIG. 10, reference numeral 14 represents a light source such as a fluorescent lamp, 15 a reflector, 13 a reflecting layer formed on the opposite side to a first light emitting surface 12 of a first element 50, 16 a lens unit like the lens described hereinabove, 40 a prism unit, and a second light emitting surface 32.
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