然而，本领域的技术人员应该可以理解，发光设备50的数量，位置和类型可以在不脱离本发明的主旨和保护范围内进行修改。
However, it is understood by those skilled in the art that the number, location and type of light emitting device 50 can be modified without departing from the spirit and scope of the invention.
然而，本领域的技术人员应该可以理解，发光设备50的数量，位置和类型可以在不脱离本发明的主旨和保护范围内进行修改。
However, it is understood by those skilled in the art that the number, location and type of light emitting device 50 can be modified without departing from the spirit and scope of the invention.
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