生产与运输领域的安全性 ,往往依赖于发光信号装置的技术水平 ,尤其是其可靠性。目前 ,在发光信号装置中使用的光源多半是传统光源 ,即白炽灯或气体放电灯。此类光源的寿命一般仅约 30 0 0小时 (与燃点状态有关 ) ,其发光效率约为8～ 15ｌｍ Ｗ (未经滤光片过滤的全色光 ) ,但 Safety in the field of production and transport often depends on the technical level of the luminescent signal device, in particular its reliability. At present, most of the light sources used in the light emitting device are conventional light sources, that is, incandescent lamps or gas discharge lamps. Such light sources typically have a lifetime of only about 300 hours (depending on the flash point condition) and have a luminous efficiency of about 8 to 15 lmW (unfiltered full color light) but