| 摘要 |
An elongate tube formed from a composite material comprising a polymer and a photoluminescent material has a cylindrical wall that defines an arc of between about 180 degrees and 360 degrees or greater. An elongate opening is defined in the wall along the length of the tube. The wall of the tube is flexible which permits the opening to be manually enlarged to enable the tube to be mounted over an electric light source. The wall is configured to approximate the outer dimensions of the light source which retains the tube on the light source. The photoluminescent material in the tube wall is energized by the light source and emits sufficient light for a period of time if the electricity to the light source is temporarily interrupted. |
