| 摘要 |
A lamp shade is provided in the form of a translucent material in a generally tubular shape disposed about the vertical axis of a light source. The shade has an optical transmittance in the horizontal plane passing through the centroid of the light source, and a greater optical transmittance through the portion of the shade extending below the horizontal plane. A preferred embodiment controls the optical transmittance providing variable reflectance on the inner surface of the shade, and includes a generally reflective upper end closure having a means for supporting the shade, and a generally reflective convex cone below the light source.
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