Luminiferous gem is the man made modern night shining jewel developed with modern technology by research workers and caused strong echo in gemstone circle.

发光宝是近期由我国科学工作者依靠现代科学技术研“现代夜珠”,在宝起强烈反响。

The direction of luminiferous evacuation indicator is fixed in complex fire accident scene，that is difficult to play safe and effective role in the evacuation instructions.

发光型疏散指示牌指方向固定不变，在复杂火灾事故现场难于起到安全有效疏散指示作用。