| http://www.w3.org/ns/prov#value | - Tube 98 can, for example, be formed of a structural material such as aluminum and preferably has an internal surface which is highly reflective. [0042] In the embodiment illustrated in FIG. 5, sunlight exiting tube 89 strikes a beam splitter 90 which reflects a first portion of the sunlight into light distributor tube 91 while allowing another portion of the sunlight to pass through beam splitter
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