| http://www.w3.org/ns/prov#value | - a light source including multiple arc lamps, the light source having an effective source size and emitting a principal light ray and an associated bundle of polychromatic light rays; multiple fold mirrors in the form of a pinwheel-shaped mirror configuration, each fold mirror associated with a different one of the arc lamps so that the bundle of polychromatic light rays is substantially collimated
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