| 摘要 |
A system for providing interior lighting for a building from a natural exterior source including reflectors adapted to reflect the light into a light unit from which the light may be diffused into the building. A sensor keeps the principal reflector aligned with a light source, ordinarily the sun, and side reflectors assure that the sunlight from sunrise to sunset is properly directed into the building. The system is useful, to a lesser extent, for heat as well as light.
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